Earth's History

Which layer is the oldest?

• 3
• 4
• 1
• 5

Trilobites are found in the _____________.

• Cenozoic
• Mesozoic
• Paleozoic
• Cretaceous

The Precambrian is the ___________ time span in Earth's history.

• youngest
• latest
• earliest
• middle

According to the law of superposition, the oldest fossils are found 

• At the top of the rock layers
• Near the bottom of the rock layers
• In the middle of the rock layers
• Somewhat near the surface

Current scientific evidence shows that the Earth is estimated to be: 

• Less than 1 millions years old
• Between 3 and 4 billion years old
• More than 4 billions years old
• Less than 2 billion years old

Which word best describes relative dating?

• Older
• 14 years old
• 2017
• 4.6 million years ago

Which of the following correctly lists the layers in order from oldest to youngest?

• A, B, C, D, E
• E, B, C, D, A
• E, D, C, B, A
• C, B, A, D, E

Which best describes a fossil that helps determine the relative age of a rock layer?

• trace fossil
• index fossil
• radioactive fossil
• unconformity fossil

What role do faults play in the Law of Superposition?

• Faults create new types of rock.

• Faults are younger than the layers they cut through.

• Faults are the same age as the layers they cut through.

• Faults are older than the layers they cut through.

According to the diagram, what is the most recent event?

• B

• I

• R

• H