Geologic Time Test Review

A trace of past life is called a

Which of the following is most likely to become a fossil?

• shell

• fur

• skin

• muscle

Which of the following is NOT likely to become a fossil?

• bone

• fur

• teeth

• shell

In order for an organism to become a fossil it must be buried ____

Most organisms do not become fossils because the decompose or

Most species of plants and animals that have lived on Earth

• are alive today

• are now on Mars

• have become extinct

• first appeared during the Precambrian

Fossils are found in which type of rocks?

• igneous

• metamorphic

• sedimentary

The oldest layer of rock is letter​ ​ (a)  

• A
• B
• C
• D

The youngest layer of rock is letter​ ​ (a)  

• A
• B
• C
• D

Rock layer M is most likely ____ rock layer O.

• the same age as

• older than

• younger than