Bill Nye - Fossils Video Quiz

Almost all of the things (species) that have ever lived on earth are __?__.

Fossils are evidence of organisms which were once alive that has been turned to....

What percent of organisms that have ever been on earth has gone extinct?

Dinosaur fossils are hundreds of __?__ of years old.

When a shell leaves an impression in something else, like clay, a __?__ is formed.

Not all fossils are bones that have hardened into stone. Sometimes when a plant or animal dies it leaves a(n) __?__ in Earth's layers.

Some of the oldest fossils are as much as 3 __?__ years old.

When wood is fossilized it is called __?__ wood.

What are scientists able to learn about fossilized tracks?

A scientist that studies fossils of ancient plants and animals