Stuff
What do we call the process that slowly breaks down rocks?
Weathering
You can usually find marshes at the edge of _______ and _______.
Lakes and Streams
What do we call the different layers found in soil?
Horizons
What is the process called when sediments are carried away?
Erosion
What is another word for "Physical" Weathering?
Mechanical Weathering
What large sheets of ice carry rocks and dirt as they move?
Glaciers
What natural force can pull rocks downhill?
Gravity
Which type of weathering breaks rocks into smaller pieces without changing their composition?
What do we call the slow movement of soil and rock down a slope?
Creep
What is the solid rock layer called that is found beneath the soil?
Bedrock
What do we call it when sediments settle down and stop moving?
Deposition
What are the two main kinds of weathering?
Physical/Mechanical and Chemical
Rockfalls, landslides and mudslides are examples of this.
Erosion
What natural force can blow sand into piles called dunes?
Wind
What is the rich, dark top layer of soil that comes from decayed plants?
Humus
What is the layer below the topsoil that has less organic material?
Subsoil
Tiny rock pieces, air, water, and decayed plants & animals make up ________.
Soil
What are the agents (causes) of weathering?
1. Wind
2. Water
3. Ice
4. Gravity
What happens to rocks that travel a long way in water?
They become smaller and rounded.
What are the long, narrow islands called that protect the shore from waves?
Barrier Islands
What type of weathering changes the composition of rocks?
Chemical Weathering
How can people affect weathering and erosion?
By digging and building, which speeds up weathering and erosion.
What landform is made when a river drops off sediments at the ocean?
Deltas
What happens to sediments when a river slows down?
They get deposited in a riverbed.
Name 3 types of chemical weathering.
water, acid, and air.