Slow and Rapid Changes

Front

What is the process called when sand blows against a rock and changes its shape?

Back

Erosion

Front

What is the term for the breaking down of rock materials on the surface of the earth?

Back

Weathering

Front

What happens to water when it freezes?

Back

It expands.

Front

What geological feature is formed by the erosion of rock over millions of years, exemplified by the Grand Canyon?

Back

A canyon.

Front

What is a very large ocean wave caused by an underwater earthquake called?

Back

Tsunami.

Front

What is the difference between weathering and erosion?

Back

Weathering is the breaking down of rocks, while erosion is the movement of those broken materials.

Front

What role does ice play in the weathering process?

Back

Ice can expand in cracks of rocks, causing them to break apart.

Front

What is the main agent of erosion in desert environments?

Back

Wind.

Front

How does the process of erosion contribute to the formation of sedimentary rocks?

Back

Erosion transports sediments that can accumulate and compact to form sedimentary rocks.

Front

What is the significance of the Grand Canyon in understanding geological time?

Back

It illustrates the processes of erosion and sedimentation over millions of years.