Fossils and evolution

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…