Relative/Absolute Dating of Fossils

_{What can scientists learn from the sequence of rock layers?}

• Geologic history of that area
• Future geological events
• the number of organisms that live in the area
• the impact that hikers have had on an area.

_{Which rock layer in the diagram seems to be the oldest?}

• F
• E
• B
• A

According to the law of superposition, which layer is the youngest?

• A
• B
• C

Which of the following is the oldest?

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

_{Which rock layer in the diagram seems to be the oldest?}

• F
• E
• B
• A

What is the youngest layer in the outcrop?

• A
• B
• C
• D

Relative dating of rock layers tells us that the deeper we dig, _______.

• the younger the rocks get
• the smellier the rocks get
• the harder the rocks get
• the older the rocks get

A scientist who studies fossils is called a ________________.

• paleontologist
• geologist
• astronomer
• scientist

The length of time required for half of the radioactive atoms in a sample to decay is its...

• era
• age
• half-life
• eon

Scientists use radioactive decay to measure...

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