Geologic Time Scale Test

Front

What is an extrusion?

Back

A hardened layer of lava on Earth's surface.

Front

What are the two methods used for determining the age of rocks and fossils?

Back

Relative and Absolute Dating.

Tags

NGSS.HS-ESS1-5

Front

What does the Law of Superposition state?

Back

Younger rock layers are on top of older rock layers.

Tags

NGSS.MS-ESS1-4

Front

What is an index fossil?

Back

A fossil that is used to define and identify a particular time period in the geologic time scale.

Tags

NGSS.MS-ESS1-4

Front

Which fossil is considered the best index fossil?

Back

Frog.

Front

What does relative age tell us about a rock layer or fossil?

Back

The age of one rock layer or fossil compared to another.

Tags

NGSS.MS-ESS1-4

Front

What is absolute dating?

Back

A method used to determine the exact age of a rock or fossil using radiometric techniques.

Front

What is a fault?

Back

A fracture in the Earth's crust along which movement has occurred.

Front

What is an intrusion?

Back

Magma that has cooled and solidified beneath the Earth's surface.

Front

What is an unconformity?

Back

A gap in the geologic record that indicates a period of erosion or non-deposition.

Tags

NGSS.MS-ESS1-4