Fossils allow scientists to determine when and for how long a certain species lived.

What can scientists deduce from this discovery?

A.

earth's life has changed over time

B.

which fossils are heavier

C.

the food sources that were available

D.

explain how earth remained unchanged

The answer is A. Earths life has changed over time

The answer is A, they can work out how life has changed by comparing it to it other fossils, and modern animals.

They can do B with a scale

For C, they would need to find fossil remains in the stomach of another fossil to work out the food sources available

And for D, we know the Earth has changed, so we don't need to explain how it hasn't