The Relative Age of Rocks ch. 4.2 17-18

The age of a rock compared to the ages of other rocks is the rock's

• absolute age
• geologic age
• sedimentary age
• relative age

A formation of igneous rock on Earth's surface is known as 

• a gap
• an intrusion
• a fault
• an extrusion

The number of years that have passed since the rock formed is the rock's

• relative age
• law of superposition
• absolute age
• index fossil

A break in Earth's crust is called

• an intrusion
• a fault
• a layer
• an index fossil

Relative age is different from absolute age because

• relative age compares rock with surrounding rock while absolute age is how many years since the rock was formed
• relative aging is more accurate than absolute aging
• absolute age compares rock with surrounding rock while relative age is how many years since the rock was formed.
• Relative age is used to determine rock age and absolute age is used to determine age of fossils

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

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

• F
• E
• B
• A

Look at the diagram, what layer did animal E first show up in?         

• Layers #4
• Layers #5
• Layers #6
• Layers #7

A break in Earth's crust is called

• an intrusion
• a fault
• a layer
• an inclusion

To be considered an index fossil, it had to have lived for a relatively short period of time.

• True
• False