old hard remains of plants and animals that lie buried under the Earth for a long time. give one word answer
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Fossils are impression, or trace of an animal or plant of a past geologic age that has been preserved in Earth's crust. The oldest fossils in the fossil record date from 3.5 billion years ago. They are great sources for learning about how animals and plants lived and behaved millions of years ago.
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Fossils are preserved remains or traces of organisms. They lived in Earth's past. Most fossils form in sedimentary rock. Fossils can also be preserved in other ways
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