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| Traces or remains of living things from long ago. |
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| Fossils that are the actual bodies or body parts of organisms. |
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| Fossils form best in this type of rock. |
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| This type of rock is to hot for fossils to form. |
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Term
| An organism dies and falls into soft sediment. Then the organism decays leaving a ______ behind. |
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Term
| Minerals fill a mold and make a _____ of an organism |
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| When a tree falls and gets covered with sediments water passes through the sediments and into the trees cells. Minerals in the water replace the wood and causes the wood to become... |
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| A form of rock fossil that can show the soft parts of organisms. |
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| A form of rock fossil that show animal impressions rather than bones.For example a footprint. |
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| By analyzing these you can tell if there was alot of rain in past years. |
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| Can be used to show evidence of major volcanic eruptions. |
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Term
| The earliest fossil is a __________ organism. |
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Term
| The age of an object or event in relation to other events or objects. |
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Term
| In rock formations the oldest rock is always on the... |
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Term
| A molten rock that cuts though rock formations. |
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Term
| Fossils that exsisted only during specific time spans. |
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Term
| The actual age of an event or object. |
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Term
| The length of time it takes for half of the atoms in a sample of a radioactive element to change from an unstable form into another form. |
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| Scientist can't date this type of rock using radioactivity directly. |
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Definition
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Term
| Radioactive dating works best with this type of rock. |
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Term
| The law claiming that the Earth is an always changing place. |
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Definition
| The Law Of Uniformtarianism |
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| An organized chart of Earth's history. |
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| The dinosaurs lived during this era. |
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| The era we currently live in. |
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