Geologic History

Which layer is the oldest?

• D
• C
• B
• A

Faults are younger than the rocks they cut. True or False

• True
• False

Faults are younger than the rocks they cut. True or False

• True
• False

The Law of Superposition is ________ dating.

• Absolute
• Relative

Which of the following is the oldest?

• Layer L
• Intrusion D
• Intrusion H
• Layer E

Which principle or law states that "the processes that shape the world today also operated in the past."

• Uniformitarianism
• Original Horizontality
• Lateral Continuity 
• Superposition 

Which principle or law states that "When layers of sediments are deposited, they settle in flat, horizontal layers."

• Uniformitarianism
• Original Horizontality
• Lateral Continuity 
• Superposition 

What is the time needed for half of a sample of a radioactive substance to undergo radioactive decay?

• Half life
• Isotope
• Radioactive decay
• None of these

The study of past life using fossils is called?

• Paleontology
• Relative dating
• Modern Geology
• Uniformitarianism

Scientists use radioactive decay to measure...

• relative time
• absolute time
• half-lives
• time of day