Earth Science Unit 1 Review

What was the first organism that released oxygen into Earth's atmosphere?

• plants
• animals
• cyanobacteria
• photosynthesis

When did dinosaurs become extinct?

• Precambrian
• Palezoic
• Mesozoic
• Cenozoic

What is geology?

• Study of history of Earth
• Study of history of solar system
• Study of the development of life on Earth
• Study of geometry

When did Pangea form?

• Precambrian
• Palezoic
• Mesozoic
• Cenozoic

What are two examples of trace fossils?

• burrow and tracks
• shells and bones
• mosquito and bee in amber
• tracks and fur

Used to determine whether an object is older or younger than other objects

• Superposition
• Relative Dating
• Fossil
• Unconformity

If you found a fossil of a fish on a mountaintop, what could you conclude?

• It is now extinct.
• It just died.
• The fossil is older than the mountaintop.
• The mountaintop was once in an ocean.

States that younger rocks lie above older rocks if the layers have not been disturbed

• Law of crosscutting
• Law of superposition
• Relative Dating
• Unconformity

A break in the geologic record that is made when rock layers are eroded over a long period of time

• Law of Superposition
• Law of Crosscutting
• Relative Dating
• Unconformity

Traces or remains of organisms that lived long ago

• Fossil
• Unconformity
• Superposition
• Column