Fossils

Question 1

What are fossils

Answer 1

The remains of an organism from millions of years ago which are found in rocks

Question 2

How are fossils formed

Answer 2

From parts of organisms that have not decayed because one or more of the conditions needed for decay are absent e.g. amber, glaciers and peat bogs
When parts of the organism are replaced by minerals as they decay
As preserved traces of organisms e.g. footprints burrows and rootlet traces of

Question 3

Why can scientists not be certain about how life started on earth

Answer 3

Many early forms of life were soft bodied meaning they have left few traces behind
Many traces have been destroyed by geological activity

Question 4

What can we learn from fossils

Answer 4

How much or how little different organisms have changed as life developed on earth