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13 Cards in this Set
- Front
- Back
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Fossil |
Preserved evidence of an organism, often found in sedimentary rocks, that provides evidence of past life. |
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Paleontologists |
scientists who studies fossils. |
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Relative Dating |
Methods used to determine the age of rocks by comparing the rocks with younger and older rock layers. |
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Law Of Superposition |
States that the oldest layers of rock are found at the bottom and the younger layers are found at the top of a formation, if the rock layers have not been disturbed. |
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Radiometric Dating |
Methods used to determine the age of rocks using the rate of decay of radio active isotopes. |
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Half-Life |
Amount of time required for half a radioactive isotope to decay. |
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Geologic Time Scale |
model showing major geological and biological events in Earth's history. |
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Cambrian Explosion |
Rapid diversification of most animal groups marking the start of the Paleozoic era. ( The first time animals shown up) |
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K-T Boundary |
Layer of iridium-rich material between the rocks of the Cretaceous period and the Paleogene period that provides evidence of a meteorite. |
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Plate Tectonics |
Geological theory that the Earths surface is broken into several large plates that move slowly on a partially molten rock layer. |
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Spontaneous Generation |
The idea that life rises or exists from nonliving things. |
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Theory Of Biogenesis |
States that only living organisms can produce living organisms. |
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Endosymbiant Theory |
Explains that Eukaryotic cells may have evolved into Prokaryotic cells. |
