Fossils and evolution

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What can fossils tell us about the history of life on Earth?

  • Fossils are the preserved traces or remains of organisms that live thousands or millions of years ago
  • We find fossils when the rocks containing them are weathered
  • The history of life on earth as shown by the fossils from different periods of time are known as fossil record
  • This suggests that organisms have changed gradually through time (process called evolution)
  • Soft tissue and decay do not usual form fossils, so soft-bodied organisms leave littlel fossil evidence behind
  • Other dead organisms did not form fossils because the hard parts were destroyed 
  • Many fossils are burried deep in the


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