Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards

Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Science Chap 9

Weathering and Erosion

weathering 1. process of breaking down rocks into smaller pieces 2. caused by wind, water, and plants
subsoil 1. soil layer that is mostly coarse, weathered rocks 2. does not contain humus
topsoil 1. layer in which most plants grow 2. layer that contains humus
bedrock solid, unweathered rock under layers of soil
frost weathering breaking down of rocks from water in and around rocks and soil freezing and expanding
humus decayed plant and animal material in soil
soil 1. loose material on the surface of the earth 2. made of weathered rock, water, air, and humus
3 sizes of weathered rock sand silt clay
abrasion water or wind gradually wear away rock by friction
landforms 1. physical features of the earth's surface 2. examples: canyons, mountains, islands, dunes
deposition the dropping of sediment in a new place
sediment small bits of rock and other material
delta area of sediment that builds up at the mouth of a river
erosion 1. moving of bits of weathered material from one place to another 2. caused by water, wind, or ice 3. can happen slowly or rapidly
deposited sediment makes the mouth of the river shallower
dunes can be caused by wind erosion
canyons and gorges can be caused by water erosion
avalanche 1. sudden downhill movement of a large amount of snow and ice 2. caused by gravity
landslide 1. rapid downhill movement of a large amount of soil and rock 2. caused by gravity
glacier 1. huge sheet of ice that stays frozen year-round 2. can pick up rock and sediment 3. can cause u-shaped valleys which form ponds or lakes
moraines hills that are caused by glaciers
activities of people that can cause erosion 1. paved areas allow water to run off and cause erosion of the surrounding soil 2. removing plants increases the amount of topsoil that erodes
volcanoes and earthquakes can push land upward
volcano to island be prepared to explain how a volcano can form an island pg. 189
Created by: PRO Teacher dsaff