Erosion

Erosion is a gradual process or wearing away of ______ and rock.

• soil

• water

• air

• plants

What are the causes of erosion?

• A) Rivers, glaciers, wind, and rainwater

• B) Earthquakes and volcanoes

• C) Human activities and deforestation

• D) None of the above.

What type of fuel is natural gas?

• Renewable energy

• Fossil fuel

• Nuclear energy

• Biomass

Fill in the blank: A _______ is the place where oil is processed or made into useful chemicals.

• Refinery

• Bakery

• Factory

• Warehouse

Where is the Grand Canyon located?

• Nevada

• Arizona

• Utah

• Colorado

How deep is the Grand Canyon at its deepest point?

• 5,000 feet

• 6,000 feet

• 7,000 feet

• 8,000 feet

The Grand Canyon was formed by ______ by the Colorado River.

• erosion

• volcanic activity

• glacial movement

• tectonic uplift

What natural process formed the Grand Canyon?

• Volcanic activity

• Earthquakes

• Erosion

• Glacial movement

Which of the following is a natural resource?

• Copper

• Plastic

• Glass

• Rubber

Which state is a leading producer of Copper?

• California

• Arizona

• Nevada

• Texas