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Large rocks break into smaller rocks. Small rocks break down into sand and soil. What is the name of this?
Weathering.
True or False: The weathering of rocks can take thousands of years.
False.
What causes weathering?
Running water, wind, rain, and temperature changes.
What can pick up small rocks causing them to scrape against each other eventually wearing away the rocks?
Running water and wind.
True or false: Repeated freezing and thawing of water breaks rocks apart.
True.
What two living things cause weathering?
Plants and animals.
What is the wearing away and movement of weathered rocks called?
Erosion
How does gravity cause erosion?
By pulling weathered materials downhill.
True or false: A glacier moves across land quickly.
False.
What causes erosion to happen quickly?
Floods.
What types of bodies of water pick up rocks and sand?
Rivers, streams, and ocean waves.
True or False: Deposition is the dropping off of rocks.
False.
How do glaciers move rocks?
The ice at the bottom of a glacier moves, it tears rocks out of the ground. As a glacier melts, it leaves rocks in a new place.
True or False: People can only change the land in small ways.
False.
What happens if trees are not replanted?
Soil can wash away.
