Ch 10 Geological History
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Plate Tectonics | A theory stating that the earth's outer shell is made up of about twenty plates.
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| Erosion | The wearing down of the Earth's surface by natural means.
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| Fossils | The remains or impression of a plant or animal hardened in rock.
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| Geologic Time | The timing and relationships between the events that have occurred during the history of the earth. The earth is 4.6 billion years old.
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| Eras | represents a time of major sediment deposition and earth movement.
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| Canadian Shield | Only region of Canada existing during Precambrian Era. Some of its mountains were 12 000 meters, taller than any that are around today.
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| Folding | When the land is under huge force and is up lifted and the earth buckles (also forms mountains)
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| Faulting | When the earth's surface cracks due to pressure (also forms mountains)
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| Igneous rock | When liquid magma rises from the mantel and cools and hardens
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| Metamorphic Rock | Occurs when sedimentary or igneous rock is changed due to temperature and pressure.
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| Sedimentary Rock | When rock is broken down and is transported by water. It is laid down in layers.
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| Glaciers | Huge masses of ice.
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| Ice Age | A period of long-term reduction in the temperature of Earth's climate
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| seismologist | Scientist that studies earthquakes and the effects of them.
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| Wegener | In 1915 came up with the theory of continental drift.
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| Cenozoic | "The Age of Mammals", began 65 million years ago (still going on), Continents drifted to current position, Alps, Himalayas, & Andes were folded.
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| Mesozoic Era | Middle life that spanned 180 million years. Known as the age of reptiles. It has three periods: Triassic, Jurassic, Cretaceous. Events of this era include Pangea starts to break apart, dinosaurs were alive and died, Rocky Mtns were formed.
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| Pangaea | All the continents put together to form a super-continent
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| Precambrian | Time period that spans around 4,500 million years ago when the earth was created to the evolution of abundant macroscopic hard-shelled animals
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