| #9245, aired 2025-01-10 | GEOLOGY $400: Hydrothermal & fissure are types of these openings through which gases heated by magma pass a vent |
| #9245, aired 2025-01-10 | GEOLOGY $800: Dip-slip, strike-slip & thrust are types of these divisions faults |
| #9245, aired 2025-01-10 | GEOLOGY $1200: Many rocks are named for places: elbaite (island), flagstaffite (city), this common volcanic rock (South American mountain chain) andesite |
| #9245, aired 2025-01-10 | GEOLOGY $1600: This common fossil-rich sedimentary rock is formed mostly from oceanic ooze limestone |
| #9245, aired 2025-01-10 | GEOLOGY $2000: You've had 65.5 million years to learn that you're living in this geologic era Cenozoic |
| #9218, aired 2024-12-04 | GEOLOGY $400: This layer of the Earth makes up more than 80% of its volume the mantle |
| #9218, aired 2024-12-04 | GEOLOGY $800: A Spanish word for a cooking pot gives us this term for a type of volcanic crater a caldera |
| #9149, aired 2024-07-18 | GEOLOGY $200: 18th century German geologist Abraham Werner was called a neptunist because he believed all rocks originated from here the ocean |
| #9149, aired 2024-07-18 | GEOLOGY $400: This word is followed by "-ification" when plants transform into a combustible solid with increased carbon content coal |
| #9149, aired 2024-07-18 | GEOLOGY $600: 250 million years ago at the start of this period without a movie "Park", all the land masses were basically one supercontinent Triassic |
| #9149, aired 2024-07-18 | GEOLOGY $1000: Aeolian landforms such as dunes & ripple ridges are shaped by the action of this wind |
| #9149, aired 2024-07-18 | GEOLOGY $1,600 (Daily Double): An attraction at Carlsbad Caverns is one of these long formations known as the Sword of Damocles a stalactite |
| #8918, aired 2023-07-19 | GEOLOGY $400: This word for a type of blood vessel is also used for a mineral-filled fissure within rock a vein |
| #8918, aired 2023-07-19 | GEOLOGY $800: This process is the weathering of particles as they're worn away & moved by wind or water erosion |
| #8918, aired 2023-07-19 | GEOLOGY $1200: Seen here, deposits at Badwater Basin of what is mostly this mineral leave polygon-shaped designs due to water evaporation salt (sodium chloride) |
| #8918, aired 2023-07-19 | GEOLOGY $1,600 (Daily Double): Leapfrog is software scientists use to create 3D models of this kind of relative elevation map, partly from Greek for "place" topographical (topographic) |
| #8918, aired 2023-07-19 | GEOLOGY $2000: Millions of years ago, all of the continents were combined in a "super" one called this, meaning "all earth" Pangaea |
| #8796, aired 2023-01-30 | GEOLOGY $200: Before it reaches the surface & goes blooey, lava is known as this magma |
| #8796, aired 2023-01-30 | GEOLOGY $400: "Plucking" is the process by which one of these freezes the bedrock beneath it, cracks it & carries bits away a glacier |
| #8796, aired 2023-01-30 | GEOLOGY $600: This lightweight, porous volcanic rock is used in concrete & plaster as well as in abrasives & scouring compounds pumice |
| #8796, aired 2023-01-30 | GEOLOGY $800: Also a word for a resident of Russia's capital, it's the most common form of mica muscovite |
| #8796, aired 2023-01-30 | GEOLOGY $1000: Rocks formed by heat at great depths within the earth can be called abyssal or this, after the Roman god of the underworld plutonic |
| #8738, aired 2022-11-09 | GEOLOGY $400: It's the point on Earth's surface directly above the internal point where an earthquake rupture begins the epicenter |
| #8738, aired 2022-11-09 | GEOLOGY $800: Chalk & tufa are varieties of this sedimentary rock that's mostly calcium carbonate limestone |
| #8738, aired 2022-11-09 | GEOLOGY $1200: Used in the Stone Age for spear points & arrowheads, this form of quartz later found a use in firearms flint |
| #8738, aired 2022-11-09 | GEOLOGY $1600: A horseshoe lake is also called this kind, from a type of collar worn by a different draft animal an oxbow lake |
| #8738, aired 2022-11-09 | GEOLOGY $2000: From Greek for "fire", this "flow" is super-hot rock & gas emitted by a volcanic eruption pyroclastic |
| #8621, aired 2022-04-18 | GEOLOGY $400: Traveling up to 5 miles per second, "P" waves are the faster of the 2 main waves associated with these seismic events earthquakes |
| #8621, aired 2022-04-18 | GEOLOGY $800: Also a section at the back of a book, this word is used for fossils like trilobites that can help identify certain time periods index |
| #8621, aired 2022-04-18 | GEOLOGY $1200: Botticino & Calacatta are Italian varieties of this metamorphic rock marble |
| #8621, aired 2022-04-18 | GEOLOGY $1600: Like piles of wind-driven snow, deposits of gravel & boulders that form when glaciers melt are called these drifts |
| #8621, aired 2022-04-18 | GEOLOGY $2000: This technology, GPR, lets geologists look beneath the surface at things like bedrock, soil layers & hidden water ground penetrating radar |
| #8537, aired 2021-12-21 | GEOLOGY $200: Types of lava include the smooth pahoehoe type & the rougher aa--both names come from this American island language Hawaiian |
| #8537, aired 2021-12-21 | GEOLOGY $400: If a deposit of rock isn't permeable enough to produce oil & gas, this controversial method of injecting fluid can change it fracking |
| #8537, aired 2021-12-21 | GEOLOGY $800: The Great Plains has many deposits called clinker, baked red when seams of this mineral burned coal |
| #8537, aired 2021-12-21 | GEOLOGY $1,000 (Daily Double): The same substance may crystallize in 2 forms, like these 2 forms of carbon: one was first converted to the other in a lab in 1955 graphite into diamond |
| #8537, aired 2021-12-21 | GEOLOGY $1000: A transform fault such as the San Andreas is where 2 of these very large plates slide past each other tectonic plates |
| #8278, aired 2020-11-11 | GEOLOGY $200: An event around 8,000 B.C. called the Flims rockslide created Ruinaulta, the Grand Canyon of this Alpine country Switzerland |
| #8278, aired 2020-11-11 | GEOLOGY $400: The VEI, or this adjective "explosivity index" , rates Tambora (1815) a 7 with 100 cubic kilometers of ejected material a volcanic |
| #8278, aired 2020-11-11 | GEOLOGY $800: These features have their disastrous downsides, but on the plus side many, such as Australia's Junction one, host gold deposits faults |
| #8278, aired 2020-11-11 | GEOLOGY $1000: If water or wind alters rock, it's called by this meteorological name; if that process moves the rock, that's erosion weathering |
| #8278, aired 2020-11-11 | GEOLOGY $1,500 (Daily Double): J. Harlen Bretz explored many of these with his dog; in his book, these "of Missouri", he called them "valleys with roofs" caves |
| #8172, aired 2020-03-03 | GEOLOGY $400: It's a small tremor that follows a larger earthquake an aftershock |
| #8172, aired 2020-03-03 | GEOLOGY $800: One of the 3 main types of rock, it's formed by the buildup of material either on land or underwater sedimentary |
| #8172, aired 2020-03-03 | GEOLOGY $1200: This "middle life" era of geological time encompasses the Triassic, Jurassic Cretaceous periods the Mesozoic |
| #8172, aired 2020-03-03 | GEOLOGY $1600: This process by which organic matter becomes stone-like usually involves the replacement of tissues with silica or calcite petrification |
| #8172, aired 2020-03-03 | GEOLOGY $2000: In western Kenya 60'-wide cracks have appeared where this geological "valley" is opening up the Great Rift Valley |
| #7476, aired 2017-02-27 | GEOLOGY $400: Tephra is a collective term for all the materials ejected into the air from one of these a volcano |
| #7476, aired 2017-02-27 | GEOLOGY $800: If rocks on 2 sides of a fracture have moved away from each other, it's a fault; if not, it's this, like an ankle or knee a joint |
| #7476, aired 2017-02-27 | GEOLOGY $1200: Chrysotile, the fibrous form of serpentine, provides around 95% of this heat-resistant material in commercial use asbestos |
| #7257, aired 2016-03-15 | GEOLOGY $200: This mountain system was formed by the Eurasian & Indian tectonic plates ramming into each other the Himalayas |
| #7257, aired 2016-03-15 | GEOLOGY $400: We lava this molten material from which igneous rock is formed magma |
| #7257, aired 2016-03-15 | GEOLOGY $600: This Mideast country has around 16% of all the world's oil reserves, with an estimated 268 billion barrels Saudi Arabia |
| #7257, aired 2016-03-15 | GEOLOGY $800: (Kelly of the Clue Crew shows a geological diagram on the monitor.) Oceanic islands like Hawaii rise to the surface from the ocean floor; continental islands, like New Guinea, are simply unsubmerged parts of these shallow terraces at the edge of a continent the continental shelf |
| #7257, aired 2016-03-15 | GEOLOGY $1000: There are various North Poles; some scientists believe this one may move from Canada to Siberia within the next 50 years the magnetic North Pole |
| #7152, aired 2015-10-20 | GEOLOGY $400: A rift valley is an elongated trough formed between dip-slip types of these fractures faults |
| #7152, aired 2015-10-20 | GEOLOGY $1200: (Sarah of the Clue Crew gives the clue from Easter Island.) The Moai statues of Easter Island are made of tuff & basalt, & some of the statues feature topknots made of red scoria; all of the rock on the island is of this basic type volcanic (or igneous) |
| #7152, aired 2015-10-20 | GEOLOGY $1600: From the Greek for "without shape", this term refers to a mineral that has no definite crystalline structure amorphous |
| #7152, aired 2015-10-20 | GEOLOGY $2000: The name of this flat-topped hill smaller than a mesa is from the French for "low hill" or "mound" a butte |
| #7152, aired 2015-10-20 | GEOLOGY $3,000 (Daily Double): The Canary Current flows north to south along the edge of this continent Africa |
| #7029, aired 2015-03-19 | GEOLOGY $400: It's an earthquake that follows a larger one & has its epicenter nearby an aftershock |
| #7029, aired 2015-03-19 | GEOLOGY $800: It's the splitting of rocks & minerals along their natural fissure lines; hey Mister, my eyes are up here cleavage |
| #7029, aired 2015-03-19 | GEOLOGY $1200: (Jimmy of the Clue Crew shows a map on the monitor.) The continents were built around these large stable areas of very old crystalline rocks; the Laurentian, or Canadian one, extends for 3 million square miles across northern North America the Shield |
| #7029, aired 2015-03-19 | GEOLOGY $1600: Pot, meet this deep circular hole scoured out beneath a river or glacier a kettle |
| #7029, aired 2015-03-19 | GEOLOGY $2000: This section of crust extends from a continent's coast to a depth of 100 to 200 meters a shelf |
| #6639, aired 2013-06-27 | GEOLOGY $400: A fluvial process such as erosion is caused by the action of this geographic feature river |
| #6639, aired 2013-06-27 | GEOLOGY $800: Almost 2,000 miles below ground, the Gutenberg discontinuity is the boundary between this & the outer core mantle |
| #6639, aired 2013-06-27 | GEOLOGY $1200: The largest type of rock fragment, it's defined as more than 10" across, though we think of it as huge boulder |
| #6639, aired 2013-06-27 | GEOLOGY $1600: Examples of an inselberg, or "island mountain", include this Rio de Janeiro landmark named for its "tasty" shape Sugarloaf |
| #6639, aired 2013-06-27 | GEOLOGY $2000: You won't find Santa at this point located in the Arctic Ocean & moving toward Siberia at about 40 miles a year the magnetic north pole |
| #6519, aired 2013-01-10 | GEE! IT'S GEOLOGY $200: A flat, broad upland area; Tibet occupies the highest one in the world plateau |
| #6519, aired 2013-01-10 | GEE! IT'S GEOLOGY $400: A maar is a big hole caused by this type of explosive activity volcanism |
| #6519, aired 2013-01-10 | GEE! IT'S GEOLOGY $600: (Sarah of the Clue Crew shows a geological diagram on the monitor.) The source of many wells & springs is a permeable layer of rock called either a "water-bearing stratum" or this single-word name aquifer |
| #6519, aired 2013-01-10 | GEE! IT'S GEOLOGY $800: 1,600 miles long, it's the deepest valley on the ocean floor; James Cameron made the first solo visit to its deepest part Mariana Trench |
| #6519, aired 2013-01-10 | GEE! IT'S GEOLOGY $1000: A hollow stone nodule lined by mineral crystals growing inward geode |
| #6481, aired 2012-11-19 | GEOLOGY $400: For the metal nickel, the mineral pentlandite is a major one of these sources an ore |
| #6481, aired 2012-11-19 | GEOLOGY $800: This commonest coarse-grained plutonic rock is desirable for countertops granite |
| #6481, aired 2012-11-19 | GEOLOGY $1600: In geology it's a type of erosion; in business it's reducing staff without layoffs attrition |
| #6481, aired 2012-11-19 | GEOLOGY $2000: (Sarah of the Clue Crew presents the clue.) New York State uses 1 trillion cubic feet of natural gas a year; there may be 500 trillion cubic feet within this underground shale formation named for a village near Syracuse the Marcellus Shale |
| #6481, aired 2012-11-19 | GEOLOGY $3,000 (Daily Double): Naturally, plenty of coal was formed in this geologic period, 360 million to 300 million B.C. the Carboniferous Period |
| #6354, aired 2012-04-12 | GEOLOGY $400: The Nazca Plate's movement under the South American plate is causing this over 4,000-mile mountain range to rise the Andes |
| #6354, aired 2012-04-12 | GEOLOGY $800: It's an area where bitumen seeps to the surface, sometimes trapping animals; there's one about 5 miles from us a tar pit |
| #6354, aired 2012-04-12 | GEOLOGY $1200: So much water was frozen in the Pleistocene epoch glaciers that this was at least 330 feet lower than today sea level |
| #6354, aired 2012-04-12 | GEOLOGY $1600: Chromite, from which we get chromium, is formed when this cools & solidifies underground magma |
| #6354, aired 2012-04-12 | GEOLOGY $2000: This term refers to the layering that occurs in most sedimentary rocks & has produced Oregon's Painted Hills stratification |
| #6259, aired 2011-12-01 | GEOLOGY $400: Corundum makes up much of this rock used to make an abrasive "board" emery |
| #6259, aired 2011-12-01 | GEOLOGY $800: The sword of Damocles is a large one of these formations in Carlsbad Caverns a stalactite |
| #6259, aired 2011-12-01 | GEOLOGY $1200: Shatter cones, with radiating fracture lines, are only found at the sites of space object impacts & of these tests nuclear tests |
| #6259, aired 2011-12-01 | GEOLOGY $1600: This fancy French word refers to a deep fissure in a glacier a crevasse |
| #6259, aired 2011-12-01 | GEOLOGY $2000: A giant ocean called Panthalassa once surrounded this supercontinent, whose name means "all earth" Pangaea |
| #6079, aired 2011-02-03 | GEOLOGY $400: A deep ravine that's often dry in the summer, it shares its name with a "grand" dam in Washington state a coulee |
| #6079, aired 2011-02-03 | GEOLOGY $800: This layer of rock between the Earth's core & crust makes up about 85 percent of the planet's mass the mantle |
| #6079, aired 2011-02-03 | GEOLOGY $1200: From the Greek for "without shape", this term refers to rocks & minerals that have no crystalline structure amorphous (amorphic accepted) |
| #6079, aired 2011-02-03 | GEOLOGY $1600: Lamina is a layer in this type of rock that is less than 1 cm. in thickness & is visually separable from other layers sedimentary |
| #6079, aired 2011-02-03 | GEOLOGY $2000: "Bovine" term for a crescent-shaped lake formed in an abandoned river bend an oxbow |
| #5543, aired 2008-10-15 | GEOLOGY $400: (Kelly of the Clue Crew shows off a space rock sitting next to a picture of a city-sized crater at the University of Wisconsin-Madison Geology Museum.) The first crater on Earth identified as being made by this was made by a 60,000-ton one; here's a 300-pound chip of it a meteor |
| #5543, aired 2008-10-15 | GEOLOGY $800: This continent has turned almost 360 degrees over the past 200 million years & in 50 mil. years more will hit Asia Australia |
| #5543, aired 2008-10-15 | GEOLOGY $1600: Rocks exposed to the atmosphere go through this process, something you might do to "the storm" weathering |
| #5543, aired 2008-10-15 | GEOLOGY $2,000 (Daily Double): (Jimmy of the Clue Crew holds a sample at the University of Wisconsin-Madison Geology Museum.) Like the stuff that makes the Statue of Liberty green, the mineral malachite is a carbonate of this metal copper |
| #5543, aired 2008-10-15 | GEOLOGY $2000: (Jimmy of the Clue Crew points to an Atlantic Ocean ridge on a giant globe at the University of Wisconsin-Madison Geology Museum.) Though basically a 10,000-mile mountain chain, what's called the Mid-Atlantic this is usually only visible when it peaks out at islands like the Azores the Mid-Atlantic Ridge |
| #5513, aired 2008-07-23 | GEOLOGY $200: An earthquake with a 7.0 magnitude on this scale releases about 32 times as much energy as a 6.0 the Richter scale |
| #5513, aired 2008-07-23 | GEOLOGY $400: Generations of tourists have uplift & erosion on this "stately" plateau to thank for the Grand Canyon the Colorado Plateau |
| #5513, aired 2008-07-23 | GEOLOGY $600: (Jimmy of the Clue Crew gazes at Sugarloaf in Brazil.) Sugarloaf is one huge slab of rock rising 1300 ft. above its base; geologically, it's a granite one of these, from the Greek for "one stone" a monolith |
| #5513, aired 2008-07-23 | GEOLOGY $800: This radioactive isotope is used to date rocks from 100 to 50,000 years old carbon-14 |
| #5513, aired 2008-07-23 | GEOLOGY $1000: The explosion of a volcanic cone followed by the cone's collapse creates this bowl-shaped crater a caldera |
| #5472, aired 2008-05-27 | GEOLOGY $400: One of these struck Boston in 1755, Missouri in 1811 & Charleston in 1886, so it's not West Coast-specific an earthquake |
| #5472, aired 2008-05-27 | GEOLOGY $800: Of the 3 main classes of rock, this one accounts for about 75% of all the exposed rocks on land sedimentary |
| #5472, aired 2008-05-27 | GEOLOGY $1200: From the Greek kryos, "ice", it's the form a mineral grows into when unrestricted a crystal |
| #5472, aired 2008-05-27 | GEOLOGY $1600: Alaska's Malaspina is an example of the piedmont type of this, where ice spreads out over a large terrain a glacier |
| #5472, aired 2008-05-27 | GEOLOGY $2000: From an Old English word for "clay", it's a valuable soil consisting of clay, sand & silt loam |
| #5347, aired 2007-12-04 | GEOLOGY $400: The Mercalli scale measures the intensity of these from I to XII earthquakes |
| #5347, aired 2007-12-04 | GEOLOGY $800 (Daily Double): This 9-letter geologic science is the study of the movement & distribution of all the Earth's waters hydrology |
| #5347, aired 2007-12-04 | GEOLOGY $800: Geysers aren't common; major centers include Yellowstone, Iceland & this country's North Island New Zealand |
| #5347, aired 2007-12-04 | GEOLOGY $1200: This rock can be formed by the accumulation of shells or coral, but not from citrus fruit limestone |
| #5347, aired 2007-12-04 | GEOLOGY $2000: A 6-mile-wide caldera, or volcanic crater, is a highlight of La Palma in this Spanish Island group off Africa the Canaries |
| #5255, aired 2007-06-15 | GEOLOGY $200: Any recognizable prehistoric remains of plants or animals buried in the earth; it's from the Latin for "dug up" a fossil |
| #5255, aired 2007-06-15 | GEOLOGY $400: Abraham Werner & his followers in the 18th c. were called Neptunists; they believed that all rocks were formed here the ocean |
| #5255, aired 2007-06-15 | GEOLOGY $600: In the 5th century B.C., Empedocles argued that everything that exists can be reduced to these 4 elements earth, air, water & fire |
| #5255, aired 2007-06-15 | GEOLOGY $800: In the 1830s Louis Agassiz proved that these moved, bringing with them the rocks & boulders that covered Europe glaciers |
| #5255, aired 2007-06-15 | GEOLOGY $1000: According to plate tectonics theory, there are many plates, each consisting of the crust & the upper part of this the mantle |
| #5151, aired 2007-01-22 | GEOLOGY $400: To find gas and oil, geologists may set off an explosion & measure the waves using this instrument a seismograph |
| #5151, aired 2007-01-22 | GEOLOGY $800: Lying just below the crust, this largest of the earth's layers is about 1,800 miles thick the mantle |
| #5151, aired 2007-01-22 | GEOLOGY $1200: Andalusite, an aluminum silicate mineral, was named for the region in this country where it was discovered Spain |
| #5151, aired 2007-01-22 | GEOLOGY $1600: This geologic epoch that ended about 11,000 years ago included numerous ice ages the Pleistocene |
| #5151, aired 2007-01-22 | GEOLOGY $2000: A large area of land lying at the "foot of a mountain", it shares its name with a region in northwest Italy a piedmont |
| #5110, aired 2006-11-24 | GEOLOGY $400: A placer is a deposit of sand containing metals such as this, which brought an influx to Placer County, California gold |
| #5110, aired 2006-11-24 | GEOLOGY $800: A cauldron subsidence is when a mass of solid rock sinks into a pool of this subterranean molten rock magma |
| #5110, aired 2006-11-24 | GEOLOGY $1200: In geology, BYO isn't on a faculty party invitation; it stands for this, as in Canada's Acasta gneiss, about 4 BYO billion years old |
| #5110, aired 2006-11-24 | GEOLOGY $1600: In the mountain type of this, rock projects above the frozen stuff a glacier |
| #5110, aired 2006-11-24 | GEOLOGY $2000: William Smith's 1815 map "of England and Wales" showed these rock layers in different colors strata |
| #5022, aired 2006-06-13 | GEOLOGY $400: Pelean, Hawaiian, Strombolian & Plinian are different types of this event eruptions |
| #5022, aired 2006-06-13 | GEOLOGY $800: (Jon of the Clue Crew shows some horsts on the monitor.) The geological feature called a horst is bounded by these, which Californians know all about faults |
| #5022, aired 2006-06-13 | GEOLOGY $1200: This "table" is the saturated area of bedrock; it tends to follow the contours of the land the water table |
| #5022, aired 2006-06-13 | GEOLOGY $2,000 (Daily Double): If your burn a diamond in the presence of oxygen, it will form this gas carbon dioxide |
| #5022, aired 2006-06-13 | GEOLOGY $2000: The name of the mineral with formula Fe3O4 should tell you that it acts as a natural one of these a magnet |
| #4764, aired 2005-04-28 | GEOLOGY $400 (Daily Double): This crater is formed when a volcano explodes & the cone collapses; Oregon's Crater Lake is an example the caldera |
| #4764, aired 2005-04-28 | GEOLOGY $400: At the mouth of the Mississippi River, this major class of rock is said to be more than 40,000 feet thick sedimentary |
| #4764, aired 2005-04-28 | GEOLOGY $800: Intense glaciation has formed these long, steep-sided coastal inlets; the ones in Norway & Chile are especially deep fjords |
| #4764, aired 2005-04-28 | GEOLOGY $1200: This landmark in Rio's Guanabara Bay is an example of an inselberg, or "island mountain" Sugarloaf Mountain |
| #4764, aired 2005-04-28 | GEOLOGY $2000: Meaning "rock globe", it's the layer of rock encompassing the crust & outermost part of the upper mantle the lithosphere |
| #4601, aired 2004-09-13 | GEOLOGY $400: This rock from Georgia was used to sculpt the statue of Lincoln in the Lincoln Memorial marble |
| #4601, aired 2004-09-13 | GEOLOGY $800: Crude oil can be extracted from this rock, the most abundant sedimentary rock in the Earth's crust shale |
| #4601, aired 2004-09-13 | GEOLOGY $1200: The Hawaiian islands consist mostly of this hard, dark volcanic rock basalt |
| #4601, aired 2004-09-13 | GEOLOGY $2000: The Pilgrim Monument in Provincetown is the tallest structure in the U.S. made entirely of this granite |
| #4601, aired 2004-09-13 | GEOLOGY $7,000 (Daily Double): Due to its luster, German miners gave this "pleasant" rock its name, which means "spark" gneiss |
| #4490, aired 2004-02-27 | GEOLOGY $400: Around 132 A.D. Chinese scientist Chang Heng invented an early form of this earthquake detector seismograph |
| #4490, aired 2004-02-27 | GEOLOGY $800: One of the world's busiest geyser areas lies in a lava field near this Icelandic capital Reykjavik |
| #4490, aired 2004-02-27 | GEOLOGY $1200: In the science of geology, petrographers are concerned with classifying these rocks |
| #4490, aired 2004-02-27 | GEOLOGY $1600: In 2003 it was located at 82 degrees north latitude, 112 degrees west longitude near Ellef Ringness Island the Magnetic North Pole |
| #4490, aired 2004-02-27 | GEOLOGY $2000: (Sarah of the Clue Crew) The glaciers here in Alaska are remnants of the last Ice Age, which ended about 11,500 years ago during this epoch the Pleistocene |
| #4371, aired 2003-09-15 | GEOLOGY $400: The 2 forces that cause soil erosion are water & this, which includes a process called deflation wind |
| #4371, aired 2003-09-15 | GEOLOGY $800: This rock is basically froth formed from liquid lava pumice |
| #4371, aired 2003-09-15 | GEOLOGY $1200: The "creta" in Cretaceous comes from the Latin for this substance picked up by some blackboard erasers chalk |
| #4371, aired 2003-09-15 | GEOLOGY $1600: Do we have to spell it out for you? Speleology is the study of these caves |
| #4371, aired 2003-09-15 | GEOLOGY $2000: The Eniwetok Atoll sits on a limestone cap that's sitting on the summit of one of these a volcano |
| #4369, aired 2003-09-11 | GEOLOGY $400: This molten volcanic rock was given its name by those who lived around Mount Vesuvius lava |
| #4369, aired 2003-09-11 | GEOLOGY $800: The oxbow type of this is formed when a meander or stream is cut off from the principal channel lake |
| #4369, aired 2003-09-11 | GEOLOGY $1,200 (Daily Double): A sonar transducer is used by hydrographers to obtain knowledge about earthquake activity here under the ocean |
| #4369, aired 2003-09-11 | GEOLOGY $1600: This "old" scientist's 37-volume "Historia Naturalis" covered all Roman knowledge of rocks & minerals Pliny the Elder |
| #4369, aired 2003-09-11 | GEOLOGY $2000: It's believed that a land mass called Pangaea later split into 2: Laurasia & this one Gondwanaland |
| #4145, aired 2002-09-13 | GEOLOGY TEST $400: One estimate says there are about 326 million cubic miles of this compound in, on & above the Earth water |
| #4145, aired 2002-09-13 | GEOLOGY TEST $800: It runs from the Gulf of California to the Gorda Ridge off Oregon between the North American & Pacific plates San Andreas Fault |
| #4145, aired 2002-09-13 | GEOLOGY TEST $1200: BMW engineers are working out the kinks to use this most abundant element in the universe as an auto fuel hydrogen |
| #4145, aired 2002-09-13 | GEOLOGY TEST $1600: Calcium bicarbonate from this, the most abundant soluble rock, is used by sea creatures in forming shells limestone |
| #4145, aired 2002-09-13 | GEOLOGY TEST $2000: Deposits inside these are called speleothems & include stalactites & stalagmites caves |
| #3897, aired 2001-07-10 | GEOLOGY $200: The mineral Andalusite was discovered in & named for a region in this country Spain |
| #3897, aired 2001-07-10 | GEOLOGY $400: Fluvial is a term that refers to these geographic features rivers |
| #3897, aired 2001-07-10 | GEOLOGY $600: Granite is composed mainly of feldspar & this transparent crystalline material quartz |
| #3897, aired 2001-07-10 | GEOLOGY $800: A 79 A.D. letter about the death of this "Elder" scientist had the first accurate description of a volcanic eruption Pliny |
| #3897, aired 2001-07-10 | GEOLOGY $1000: In 1812 this German scientist devised a scale to measure the hardness of minerals Frederich Mohs |
| #3775, aired 2001-01-19 | GEOLOGY $200: One of these struck Boston in 1755, Missouri in 1811 & Charleston in 1886, so it's not west coast-specific Earthquake |
| #3775, aired 2001-01-19 | GEOLOGY $400: Of the 3 main classes of rock, this one accounts for about 75% of all the exposed rocks on land Sedimentary |
| #3775, aired 2001-01-19 | GEOLOGY $800: Term for a plate pulling apart; a great valley in Africa has been formed by & named for it Rift/rifting |
| #3775, aired 2001-01-19 | GEOLOGY $1,000 (Daily Double): From the Greek kryos, "ice", it's the shape a mineral grows into when unrestricted Crystal |
| #3775, aired 2001-01-19 | GEOLOGY $1000: 1 of the 3 minerals on the Mohs scale that can be scratched with a copper penny Calcite, gypsum or talc |
| #2918, aired 1997-04-16 | GEOLOGY $200: It's a circular hollow often formed by volcanic action or by a meteor strike a crater |
| #2918, aired 1997-04-16 | GEOLOGY $400: It's a valley formed between 2 parallel faults; there's a "Great" one in the Eastern Hemisphere a rift valley |
| #2918, aired 1997-04-16 | GEOLOGY $800: A moraine is the rocky material left behind by one of these a glacier |
| #2918, aired 1997-04-16 | GEOLOGY $900 (Daily Double): Name of the type of formation seen here:
[video clue - in Alex's hand] a geode |
| #2918, aired 1997-04-16 | GEOLOGY $1000: When discussing sedimentary rock, this term means formed of layers or beds stratified |
| #2646, aired 1996-02-19 | GEOLOGY $200: The La Brea is a famous example of one of these, an accumulation of bitumen that traps animals tar pit |
| #2646, aired 1996-02-19 | GEOLOGY $400: Term for the triangular deposit of sediments that forms where a river enters the sea delta |
| #2646, aired 1996-02-19 | GEOLOGY $600: Of the 3 major types of rocks, slate belongs to this one metamorphic |
| #2646, aired 1996-02-19 | GEOLOGY $800: Term for a thermal spring that ejects steam & boiling water geyser |
| #2646, aired 1996-02-19 | GEOLOGY $1000: The lower part of the Earth's crust is called sima because it's rich in silicon & this element magnesium |
| #2554, aired 1995-10-12 | GEOLOGY $100: Fumaroles are found near active ones of these volcanoes |
| #2554, aired 1995-10-12 | GEOLOGY $200: A rift valley is bounded by this type of line where you can really feel the earth move a fault line |
| #2554, aired 1995-10-12 | GEOLOGY $300: Material from denudation is found in this class of rocks that includes shale sedimentary |
| #2554, aired 1995-10-12 | GEOLOGY $400: Running along the coastline of North America & other land masses, it's covered by up to 600' of seawater the continental shelf |
| #2554, aired 1995-10-12 | GEOLOGY $500: A zinc ore was named for this British chemist who also had an American institution named for him (James) Smithson |
| #2548, aired 1995-10-04 | GEOLOGY $100: This mountain range was formed by the Nazca Plate crashing into the South American Plate the Andes |
| #2548, aired 1995-10-04 | GEOLOGY $200: As volcanologists study volcanoes, these specialists study earthquakes seismologists |
| #2548, aired 1995-10-04 | GEOLOGY $300: One of these moves by internal deformation or basal sliding, usually not more than 6' a day a glacier |
| #2548, aired 1995-10-04 | GEOLOGY $400: Of the 3 types of rock, most of the earth's crust is made of this one igneous |
| #2548, aired 1995-10-04 | GEOLOGY $500: To find out this term for a deep ravine or gulch that's usually dry in summer, ask a "grand dam" in Washington a coulee |
| #2468, aired 1995-05-03 | GEOLOGY $100: A cascade is a series of these, closely spaced & descending over a steer rocky surface waterfalls |
| #2468, aired 1995-05-03 | GEOLOGY $200: This earthquake measurement scale is open-ended though none has been recorded above 8.9 a Richter scale |
| #2468, aired 1995-05-03 | GEOLOGY $400: The meltwater from these is often grayish-white because of the powdered rock they contain glaciers |
| #2468, aired 1995-05-03 | GEOLOGY $500: Larger than a cobble, the largest rock fragment recognized by sedimentologists is called this a boulder |
| #2468, aired 1995-05-03 | GEOLOGY $1,000 (Daily Double): The Mohorovicic & Gutenberg discontinuities mark the boundaries of
this layer found below the crust the mantle |
| #2389, aired 1995-01-12 | GEOLOGY $100 (Daily Double): During a period of orogeny, these geological formations are built mountains |
| #2389, aired 1995-01-12 | GEOLOGY $200: Known for his "burner", this man is also noted for his study of volcanic rocks in Iceland Bunsen |
| #2389, aired 1995-01-12 | GEOLOGY $400: Term for the minerals from which pure metals can be extracted ores |
| #2389, aired 1995-01-12 | GEOLOGY $600: Common name of the sulfide mineral FeS2; it looks more valuable than it is fool's gold (iron pyrite) |
| #2372, aired 1994-12-20 | GEOLOGY $200: Of the 3 major types of rock, nearly all oil deposits occur in this one sedimentary |
| #2372, aired 1994-12-20 | GEOLOGY $400: Geologists use m.y. as an abbreviation for this length of time a million years |
| #2372, aired 1994-12-20 | GEOLOGY $600: The 3 natural industrial forms of this hard mineral are called bort, ballas & carbonado a diamond |
| #2372, aired 1994-12-20 | GEOLOGY $800: Often improperly called "tidal waves", these seem to occur after earthquakes over 6.5 tsunamis |
| #2372, aired 1994-12-20 | GEOLOGY $1000: The name of this oldest period of the Paleozoic Era comes from the Roman name for Wales the Cambrian Period |
| #2352, aired 1994-11-22 | GEOLOGY $200: This precious stone is crystalline carbon Diamond |
| #2352, aired 1994-11-22 | GEOLOGY $400: This aluminum ore was discovered at Le Bau, France Bauxite |
| #2352, aired 1994-11-22 | GEOLOGY $600: You'll find stalactites and stalagmites in caverns made of various types of this sedimentary rock Limestone |
| #2352, aired 1994-11-22 | GEOLOGY $800: Since it doesn't transmit an earthquake's S-waves, scientists believe this must be partly liquid the Earth's core |
| #2352, aired 1994-11-22 | GEOLOGY $1000: The process of coalification runs from peat to this type of coal anthracite |
| #2298, aired 1994-09-07 | GEOLOGY $100: One of these is considered dormant if it has erupted in historic times & is likely to again volcano |
| #2298, aired 1994-09-07 | GEOLOGY $200: These masses of snow that move rapidly down mountain slopes can reach speeds of over 200 MPH avalanche |
| #2298, aired 1994-09-07 | GEOLOGY $300: This Rio de Janeiro landmark is an example of an inselberg or "island mountain" Sugarloaf Mountain |
| #2298, aired 1994-09-07 | GEOLOGY $400: The landmass is the part of the continental crust above this level sea level |
| #2298, aired 1994-09-07 | GEOLOGY $500: The oldest & largest division of geological time is the Pre-this Cambrian |
| #2195, aired 1994-03-04 | GEOLOGY $100: The San Andreas is an example of the strike- slip type of these geologic features faults |
| #2195, aired 1994-03-04 | GEOLOGY $200: These long sea inlets found in Norway develop by glaciation of a previous river system fjords |
| #2195, aired 1994-03-04 | GEOLOGY $300: These events generate 3 main types of wave motion: L waves, S waves & P waves earthquakes |
| #2195, aired 1994-03-04 | GEOLOGY $400: This period from 195 to 135 million years ago was named by Brongniart for the Jura Mountains Jurassic |
| #2195, aired 1994-03-04 | GEOLOGY $500: This is the term in mining for the solid rock below the soil & gravel bedrock |
| #2141, aired 1993-12-20 | GEOLOGY $200: A new plate tectonics theory says that North America was connected to this cold continent for a billion yrs. Antarctica |
| #2141, aired 1993-12-20 | GEOLOGY $400: Tremolite, crocidolite & chrysotile are varieties of this fibrous fireproof material asbestos |
| #2141, aired 1993-12-20 | GEOLOGY $600: The largest rock size recognized by sedimentologists, it describes anything over 256 mm in diameter a boulder |
| #2141, aired 1993-12-20 | GEOLOGY $800: This portion of the Earth is everything past the Gutenberg Discontinuity, 1800 miles on down the core |
| #2141, aired 1993-12-20 | GEOLOGY $1000: This Earth measurement is 5.976 x 1027 grams the mass (the weight) |
| #2066, aired 1993-09-06 | GEOLOGY $200: It's the part of a river where you'd find the delta the mouth |
| #2066, aired 1993-09-06 | GEOLOGY $400: Glaciers don't have a cow, but they do have one of these when a chunk breaks off a calf |
| #2066, aired 1993-09-06 | GEOLOGY $600: Mafic magma is thought to originate in this solid layer beneath the earth's crust the mantle |
| #2066, aired 1993-09-06 | GEOLOGY $800: It's the term for the crater formed by a volcano that has exploded & collapsed a caldera |
| #2066, aired 1993-09-06 | GEOLOGY $1000: This region of Northwest Italy has lent its name to any large expanse of land at the foot of a mountain Piedmont |
| #2065, aired 1993-07-23 | GEOLOGY $200: These larges masses of flowing ice occur where winter snowfall exceeds summer melt glaciers |
| #2065, aired 1993-07-23 | GEOLOGY $400: Ash & pumice are examples of tephra, the fragmental material ejected from one of these volcano |
| #2065, aired 1993-07-23 | GEOLOGY $600: The mineral andalusite was named for a region of this country where it was discovered Spain |
| #2065, aired 1993-07-23 | GEOLOGY $800: This period of the Mesozoic Era is name for the Jura Mountains of Europe Jurassic |
| #2065, aired 1993-07-23 | GEOLOGY $1000: From French for "hillock", this is a flat-topped hill smaller than a mesa butte |
| #1975, aired 1993-03-19 | GEOLOGY $200: It's the large landscape feature formed by a meteorite a crater |
| #1975, aired 1993-03-19 | GEOLOGY $400: This soft metal is rarely found alone; it's usually extracted from galena lead |
| #1975, aired 1993-03-19 | GEOLOGY $600: Of the 3 main groups of rocks, this one is formed directly from magma igneous |
| #1975, aired 1993-03-19 | GEOLOGY $800: Scientists believe that from about the 1500s to the 1800s the Earth went through a little one of these ages an ice age |
| #1975, aired 1993-03-19 | GEOLOGY $1000: It's the term for submarine elevations over 3,300'; they're found singly or in chains seamounts |
| #1925, aired 1993-01-08 | GEOLOGY $200: In 1963 the island of Surtsey near Iceland was created by one of these a volcano |
| #1925, aired 1993-01-08 | GEOLOGY $400: Sea-floor spreading is covered in this theory of how the pieces of the Earth's crust move about tectonics |
| #1925, aired 1993-01-08 | GEOLOGY $600: It's the term for the lowest level of high tide neap |
| #1925, aired 1993-01-08 | GEOLOGY $800 (Daily Double): Soil contains particles of sand, silt & clay & organic particles called this humus |
| #1925, aired 1993-01-08 | GEOLOGY $1000: The 2 major geological time divisions named after American regions are the Mississippian & this Pennsylvanian |
| #1719, aired 1992-02-06 | GEOLOGY $200: Erosion by one of these moving masses often produces a U-shaped valley glacier |
| #1719, aired 1992-02-06 | GEOLOGY $400: Scientists estimate it's over 4,000 miles wide, about 5,000 degrees F. & mostly made of iron the Earth's core |
| #1719, aired 1992-02-06 | GEOLOGY $600: The Modified Mercalli index is used to rank their intensities earthquakes |
| #1719, aired 1992-02-06 | GEOLOGY $1,000 (Daily Double): From the Cape Dutch, it's a grassy African tract of land with few or no trees veldt |
| #1719, aired 1992-02-06 | GEOLOGY $1000: Sinkholes & tunnels honeycomb this type of sedimentary rock in karst on the Adriatic limestone |
| #1708, aired 1992-01-22 | GEOLOGY $200: An aquifer is a body of rock that contains & releases this water |
| #1708, aired 1992-01-22 | GEOLOGY $400: Granite is made up mainly of feldspar & this mineral which appears as transparent crystals quartz |
| #1708, aired 1992-01-22 | GEOLOGY $600: Jet black & somewhat lustrous, it's the highest rank, or class, of coal anthracite |
| #1708, aired 1992-01-22 | GEOLOGY $750 (Daily Double): Lamina refers to the thinnest discernible layer in this class of rock sedimentary |
| #1708, aired 1992-01-22 | GEOLOGY $1000: Part of the erosion process, it's the breakdown of rocks by wind, rain & temperature weathering |
| #1687, aired 1991-12-24 | GEOLOGY $100: Of a pebble, a cobble or a boulder, the smallest one a pebble |
| #1687, aired 1991-12-24 | GEOLOGY $200: Peat is considered an early stage in the development of this fossil fuel coal |
| #1687, aired 1991-12-24 | GEOLOGY $300: Dormant for over 600 years, Mt. Pinatubo erupted in this Asian island country in 1991 the Philippines |
| #1687, aired 1991-12-24 | GEOLOGY $400: The mineral nephrite is 1 of the 2 types of this oriental gemstone jade |
| #1687, aired 1991-12-24 | GEOLOGY $500: Iron pyrite is sometimes called this from its resemblance to a precious metal fool's gold |
| #1652, aired 1991-11-05 | GEOLOGY $100: Derived from Latin meaning "dug up", it's the remains of a plant or animal preserved in rock fossil |
| #1652, aired 1991-11-05 | GEOLOGY $200: A fracture in the earth along which the sides are displaced; the San Andreas is a dramatic example a fault |
| #1652, aired 1991-11-05 | GEOLOGY $300: It's the shallow body of water enclosed within an atoll a lagoon |
| #1652, aired 1991-11-05 | GEOLOGY $400: This "powdery" mineral is number 1 on the Mohs scale of hardness talc |
| #1652, aired 1991-11-05 | GEOLOGY $500: Longer than an era, this is the longest geological time unit an eon |
| #1629, aired 1991-10-03 | GEOLOGY $200: The elastic-rebound theory is one guess at the cause of these earthquakes |
| #1629, aired 1991-10-03 | GEOLOGY $400: This molten rock material beneath the Earth's surface is the source of igneous rocks magma |
| #1629, aired 1991-10-03 | GEOLOGY $600: Things described as fluvial have to do with these geographic features rivers |
| #1629, aired 1991-10-03 | GEOLOGY $800: The Jurassic period is the middle period of this middle era the Mesozoic |
| #1629, aired 1991-10-03 | GEOLOGY $1000: At mid-ocean ridges a new seafloor is being created by outpourings of this dark volcanic rock basalt |
| #1514, aired 1991-03-14 | "G" IN GEOLOGY $100: A loose mixture of particles larger than sand, you might it in your driveway gravel |
| #1514, aired 1991-03-14 | "G" IN GEOLOGY $200: This form of carbon used in pencils is also called plumbago, or black lead graphite |
| #1514, aired 1991-03-14 | "G" IN GEOLOGY $300: Africa's Olduvai, where fossils of early man were found, is one of these deep, narrow valleys a gorge |
| #1514, aired 1991-03-14 | "G" IN GEOLOGY $400: The Waimangu, one of these in New Zealand, killed at least 2 people when it erupted in 1917 a geyser |
| #1514, aired 1991-03-14 | "G" IN GEOLOGY $500: This mineral is used in making plaster of Paris & Portland cement gypsum |
| #1466, aired 1991-01-07 | GEOLOGY $200: The one near the Mariana Islands is the deepest of these long, narrow submarine depressions trenches |
| #1466, aired 1991-01-07 | GEOLOGY $400: These are formed from glaciers by a process called calving icebergs |
| #1466, aired 1991-01-07 | GEOLOGY $600: A large, diversified corporation, or a rock with pebbles & gravel embedded in it a conglomerate |
| #1466, aired 1991-01-07 | GEOLOGY $800: Any naturally occurring material from which a valuable mineral can be extracted ore |
| #1466, aired 1991-01-07 | GEOLOGY $1000: The Cenozoic era is called "the Age of" this class of animals, since they became prominent then mammals |
| #1304, aired 1990-04-12 | GEOLOGY $600: Rocks in this class can be made up of small round particles called ooliths sedimentary |
| #1304, aired 1990-04-12 | GEOLOGY $800: Of the 4 major layers of Earth, the thickest mantle |
| #1304, aired 1990-04-12 | GEOLOGY $1000: It's a soil consisting of sand, clay & silt in nearly equal proportions loam |
| #1071, aired 1989-04-10 | GEOLOGY $200: Alternate name of silicified wood, it sounds as if it was scared stiff petrified wood |
| #1071, aired 1989-04-10 | GEOLOGY $400: Term for one of the Earth's main land masses, by current count we have 7 of them continents |
| #1071, aired 1989-04-10 | GEOLOGY $600: Of the mesosphere, lithosphere or atmosphere the one you're standing on the lithosphere |
| #1071, aired 1989-04-10 | GEOLOGY $800: A lot of island, mountains or volcanoes linked together in a row a chain |
| #1071, aired 1989-04-10 | GEOLOGY $1000: Fancy French term for a fissure, as in a glacier a crevasse |
| #941, aired 1988-10-10 | GEOLOGY $200: The New York Times reports 20% of U.S. production of this comes from Prudhoe Bay oil or petroleum |
| #941, aired 1988-10-10 | GEOLOGY $400: Rock crystal is the clear form of this mineral quartz |
| #941, aired 1988-10-10 | GEOLOGY $600: Term given to the erosion of rocks from exposure & variations in humidity & temperature weathering |
| #941, aired 1988-10-10 | GEOLOGY $800: In January 1978 "Baby Come Back" was No. 1 on the pop charts & this mineral was no. 1 on the Mohs scale talc |
| #941, aired 1988-10-10 | GEOLOGY $1000: A rock that's "gneiss" falls into this class metamorphic |
| #893, aired 1988-06-22 | GEOLOGY $200: A rock is called stratified if it has many of these layers |
| #893, aired 1988-06-22 | GEOLOGY $400: Limonite, hematite & magnetite are all ores of this metal iron |
| #893, aired 1988-06-22 | GEOLOGY $600: A caldera is formed by the collapse of the cone on one of these volcano |
| #893, aired 1988-06-22 | GEOLOGY $800: The velocity of the Earth's rotation at the equator is about 1,050 mph, while at the poles, it's nearly this zero |
| #893, aired 1988-06-22 | GEOLOGY $1000: The 3 main types of waves these produce are classified as P, S & L earthquakes |
| #790, aired 1988-01-29 | GEOLOGY $100: A body of water separated from the sea by a sandbar, you might find Brooke babbling in a blue one lagoon |
| #790, aired 1988-01-29 | GEOLOGY $200: The movement of these rivers of ice carved the fjords glaciers |
| #790, aired 1988-01-29 | GEOLOGY $300: Type of rock that may be formed from material settling on the bottom of a calm river sedimentary |
| #790, aired 1988-01-29 | GEOLOGY $400: This hard coal has the highest carbon content of all coals anthracite |
| #790, aired 1988-01-29 | GEOLOGY $500: Following the Mesozoic, it's the era of geological time in which we are now living Cenozoic |
| #635, aired 1987-05-15 | GEOLOGY $200: It's a vent in the earth's crust from which gasses, pyroclastic material & lava come out volcano |
| #635, aired 1987-05-15 | GEOLOGY $500 (Daily Double): Along with amorphous carbon, which includes coal, 1 of the other 2 forms of the element carbon diamond or graphite |
| #635, aired 1987-05-15 | GEOLOGY $600: Herodotus reasoned that Egypt's fertile soil was deposited by this annual event flood of the Nile |
| #635, aired 1987-05-15 | GEOLOGY $800: A sedimentary rock composed of rounded fragments, or a big diverse company conglomerate |
| #635, aired 1987-05-15 | GEOLOGY $1000: As astrobleme is an ancient mark on the earth's surface that was produced by this meteorite |
| #483, aired 1986-10-15 | GEOLOGY $200: A natural barrier reef is made up of rock or this coral |
| #483, aired 1986-10-15 | GEOLOGY $400: The smallest lithostratigraphic division; make your own & you'll have to lie in it a bed |
| #483, aired 1986-10-15 | GEOLOGY $600: From Spanish for "chain", "cordillera" has this geological meaning a mountain range |
| #483, aired 1986-10-15 | GEOLOGY $800: Members of the largest organization of geologists in the U.S. work in this industry the oil or petroleum industry |
| #483, aired 1986-10-15 | GEOLOGY $1000: Name of the theory that the Earth's surface is made of thin, rigid units which move over the material below plate tectonics |
| #439, aired 1986-05-15 | GEOLOGY $200: Intense pressure on shale turns it into this "blackboard" material slate |
| #439, aired 1986-05-15 | GEOLOGY $400: Of 12, 26, or 49 mi., the vertical difference between the highest mountain & lowest depth of the sea 12 |
| #359, aired 1986-01-23 | GEOLOGY $200: Sometime in next 2,000-20,000 years, Loiki, a volcanic seamount, will be new island in this state Hawaii |
| #359, aired 1986-01-23 | GEOLOGY $400: While Mercalli's scale measures earthquake intensity, this is the scale usually used for magnitude the Richter scale |
| #359, aired 1986-01-23 | GEOLOGY $600: The wearing away of the earth's surface by wind, water, glaciers, etc.... erosion |
| #292, aired 1985-10-22 | GEOLOGY $200: When it flows above the ground, magma is called this lava |
| #292, aired 1985-10-22 | GEOLOGY $400: Archbishop Ussher said it occurred on Sun., Oct. 23, 4004 B.C., but geology proves the date was wrong creation |
| #292, aired 1985-10-22 | GEOLOGY $600: Created by perpetual snow, they move when weight on top causes bottom to turn plastic & flow glaciers |
| #191, aired 1985-06-03 | GEOLOGY $200: The U.S. corn belt is threatened by alarming runoff of this farmers' stratum topsoil |
| #191, aired 1985-06-03 | GEOLOGY $800: Also called hard coal, it burns without smoke anthracite |
| #191, aired 1985-06-03 | GEOLOGY $1000: Theory that all continents once formed single landmass before breaking apart continental drift |
| #182, aired 1985-05-21 | GEOLOGY $200: Striking this hard form of quartz with steel produces a spark flint |
| #182, aired 1985-05-21 | GEOLOGY $400: If you journeyed 1800 miles toward the middle of the earth, you'd find this central portion the core |
| #182, aired 1985-05-21 | GEOLOGY $600: The largest are called ice sheets, found in Greenland & the Antarctic glaciers |
| #182, aired 1985-05-21 | GEOLOGY $800: Aluminum silicate, or a '60s Leon Uris spy story which became a Hitchcock film topaz |
| #182, aired 1985-05-21 | GEOLOGY $1000: It's the submerged land surrounding the continents the continental shelf |
| #138, aired 1985-03-20 | GEOLOGY $200: Seismology is the study of this earthquakes |
| #138, aired 1985-03-20 | GEOLOGY $400: These limestone deposits rise from the ground of caves stalagmites |
| #83, aired 1985-01-02 | GEOLOGY $200: It's a fault's fault that these occur an earthquake |
| #83, aired 1985-01-02 | GEOLOGY $400: Many a fool has taken iron pyrites for this gold (fool's good accepted) |
| #83, aired 1985-01-02 | GEOLOGY $600: Weak chemical bonds cause it to occur in crystals; low cut dresses show it on women cleavage |
| #83, aired 1985-01-02 | GEOLOGY $800 (Daily Double): Rising 30,000 ft. from the ocean floor, this world's largest active volcano is in Hawaii Mauna Loa |
| #83, aired 1985-01-02 | GEOLOGY $1000: Lou Henry, first U.S. woman geology grad, was married to this mining engineer President Herbert Hoover |
| #64, aired 1984-12-06 | GEOLOGY $200: The Star of India is this type of precious stone a sapphire |
| #64, aired 1984-12-06 | GEOLOGY $400: The mouth of the Mississippi or a Helen Reddy "Dawn" a delta |
| #64, aired 1984-12-06 | GEOLOGY $600: Pliny the Elder, Roman geologist, died while observing this volcano erupting Vesuvius |
| #64, aired 1984-12-06 | GEOLOGY $700 (Daily Double): Earth's atmosphere layer which lies between the troposphere & the mesosphere the stratosphere |
| #64, aired 1984-12-06 | GEOLOGY $1000: Rainwash, wind action & differential weathering formed this S. Dakota area the Badlands |
