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100

What do we call the process that slowly breaks down rocks?

Weathering

100

You can usually find marshes at the edge of _______ and _______.
 

Lakes and Streams

100

What do we call the different layers found in soil?

Horizons

100

What is the process called when sediments are carried away?

Erosion

100

What is another word for "Physical" Weathering?

Mechanical Weathering

200

What large sheets of ice carry rocks and dirt as they move?

Glaciers

200

What natural force can pull rocks downhill?

Gravity

200

Which type of weathering breaks rocks into smaller pieces without changing their composition?

Physical
200

What do we call the slow movement of soil and rock down a slope?

Creep

200

What is the solid rock layer called that is found beneath the soil?

Bedrock

300

What do we call it when sediments settle down and stop moving?

Deposition

300

What are the two main kinds of weathering?

Physical/Mechanical and Chemical

300

Rockfalls, landslides and mudslides are examples of this.

Erosion

300

What natural force can blow sand into piles called dunes?

Wind

300

What is the rich, dark top layer of soil that comes from decayed plants?

Humus

400

What is the layer below the topsoil that has less organic material?

Subsoil

400

Tiny rock pieces, air, water, and decayed plants & animals make up ________.

Soil

400

What are the agents (causes) of weathering?

1. Wind

2. Water

3. Ice 

4. Gravity

400

What happens to rocks that travel a long way in water?

They become smaller and rounded.

400

What are the long, narrow islands called that protect the shore from waves?

Barrier Islands

500

What type of weathering changes the composition of rocks?

Chemical Weathering

500

How can people affect weathering and erosion?

By digging and building, which speeds up weathering and erosion.

500

What landform is made when a river drops off sediments at the ocean?

Deltas

500

What happens to sediments when a river slows down?

They get deposited in a riverbed.

500

Name 3 types of chemical weathering.

water, acid, and air. 

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