Erosion and Canyon Formation Concepts

What is a canyon?

• A deep gorge or gully in the Earth

• A large, flat plain

• A tall, snow-capped mountain

• A wide, sandy beach

In which U.S. state is the Grand Canyon located?

• California

• Arizona

• Texas

• New Mexico

What is the term for the natural process where dirt and rock are picked up from one place and moved to another?

• Deposition

• Weathering

• Erosion

• Sedimentation

How do floods impact the erosion of a riverbed?

• Floods slow down the erosion process.

• Floods cause the river to dry up, stopping erosion.

• Floods increase the amount of water and rocks, speeding up erosion.

• Floods have no effect on erosion.

Approximately how long ago did the Grand Canyon begin to form?

• 500,000 to 600,000 years ago

• 5 to 6 thousand years ago

• 5 to 6 million years ago

• 50 to 60 million years ago