2-The earliest part of Earth’s history is called the:

The law of ___________ states that in undisturbed layers of rocks, the oldest rock layers are at the bottom and the youngest layer is at the top.

Geologic time is divided best into units based on:

The type of Earth material most likely to contain fossils is:

Trilobite that lived for a short period of time and was abundant is an example of a(n):

7-To learn how Earth’s atmosphere has changed over time scientists study air bubbles in which of the following?

8-Rocks and fossils that are similar are found in Asia and Africa. This is evidence of: A-Continental Drift B-Fossil Record C-Law of Superposition D-Rock Cycle

9-A scientist wants to find the relative age of a rock. He most likely would use: A-radioactive dating B-law of superposition C-the geologic time scale D-ice cores

10-In which situation will older rock layers lie above younger rock layer?

Unless a layer of rocks has been overturned or shifted, the bottom rock layer:

Which layer is the youngest?

The fish fossil is older than the amphibian fossil which is older than the reptile fossil ...... this is an example of:

All of the discovered fossils make up a collection known as the:

Which of these groups of animals appeared on Earth most recently?

How do scientists know when a mass extinction took place?

All of the following help preserve organisms as fossils EXCEPT:

Trilobites can be used to study the passage of geologic time because:

Which of the following is least likely to become fossilized?

Scientists find dinosaur fossils in the bottom rock layers of a cliff and mammal fossils in the middle rock layer of the cliff. Which could best be concluded from this evidence?