vocabulary
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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| Continental Drift | hypothesis stating that continents slowly drift parallel to Earth's surface
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| Uniformitarianism | the idea that Earth's processes are at work today were also working on Earth in the past
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| Superposition | the theory that undisturbed layers rock have the oldest on the bottom and the youngest on the top
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| Sedimentary Rock | rock that is broken down into smaller pieces or that is dissolved in water
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| Pangaea | ancient super continent that began breaking up about 200 million years ago
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| Plate Tectonics | theory that explains how lithospheric plates move and interact, causing major geologic features and events
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| Fossil Record | the history of all known fossils and their placements in the formation of rocks and positions in time
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| Absolute Dating | calculated by using half-life of certain isotopes
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| Estimation | an approximate calculation of quantity
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| Radioactive Decay | when an unstable atomic nucleus changes another nucleus by emitting particle and energy
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| Igneous Rock | rock that forms from magma or lava
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| Relative Dating | age based on objects found at the same site
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| Half-life | the time it takes a given amount of a radioactive isotope to decay to half its original mass
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| Atoms | the smallest unit of matter, a nucleus surrounded by protons and electrons
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| Index Fossils | the fossilized remains of an organism that existed over vast areas for a short period time
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Or sort by any of the columns using the down arrow next to any column heading.
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