evidence for evolution - fossils

Question 1

what are fossils?

Answer 1

remains of organisms from millions of years ago which are found in rocks

Question 2

what are the 3 ways fossils form?

Answer 2

when parts of an organism haven’t decayed, when an organism decays but parts of organism are slowly replaced by minerals during decay process , preserved traces of organisms like footprints, burrows and rootlet traces

Question 3

what are examples of when conditions needed for decay are absent?

Answer 3

if temp is too cold, if not enough oxygen or water is present

Question 4

what are the problems with fossils?

Answer 4

many early life forms are soft bodied and have decayed completely, so there are few of them, and fossils from millions of years ago have been destroyed by geological activity

Question 5

how have fossils from millions of years ago been destroyed?

Answer 5

by geological activity

Question 6

how do fossils act as evidence for evolution?

Answer 6

scientists can identify the ages of fossils and use them to show how organisms change over time