Timescale of Earth's Events

Front

What is erosion?

Back

Erosion is the process that causes rough rocks to become smooth over many years by wearing away materials.

Front

What natural element besides water has shaped the Grand Canyon?

Back

Wind has changed the shape of the Grand Canyon.

Front

What type of changes can water cause to the Earth's surface?

Back

Water can cause fast changes to the Earth's surface.

Front

How often does the Earth's surface change?

Back

The Earth's surface is changing all the time in different places.

Front

How long did it take to form the Grand Canyon?

Back

It took many years to form the Grand Canyon.

Front

What is a landslide?

Back

A landslide is the movement of rock and soil down a slope, often caused by rain or earthquakes.

Front

What is a volcano?

Back

A volcano is an opening in the Earth's surface where molten rock, ash, and gases can escape.

Front

What is the role of earthquakes in changing the Earth's surface?

Back

Earthquakes can cause sudden changes to the Earth's surface, such as creating cracks and shifting land.

Front

What is the definition of weathering?

Back

Weathering is the breaking down of rocks and minerals into smaller pieces by natural forces.

Front

What is the Grand Canyon?

Back

The Grand Canyon is a large canyon in Arizona, formed by the Colorado River over millions of years.