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

River processes

weathering and mass movement terms

Weathering the decomposition of the Earth's rocks, soils and minerals through direct contact with the planet's atmosphere or plants and animals.
Chemical weathering rainwater contains weak acids that can react with certain rock types. the carbonates in limestone are dissolved by these acids and this causes the rock to break up or disintegrate.
Biological weathering seeds get dropped in cracks by animals e.g. rabbits. The seeds grow and the crack expands. The animals may then dig or burrow in the hole.
Physical weathering Rainwater freezes in the cracks and the ice expands. The expansion causes bits of rock to break off.
Soil creep The slow downhill movement of soil. Water is pulled by gravity, and takes the soil with it. It is not possible to see this happening. Heavy rainfall quickens this process. The slope left may appear rippled.
Slumping Common on river banks, like clay banks. It is where a large area of land moves down a slope, and it leaves behind a curved surface. During dry weather, the clay contracts and cracks. When it rains, the water runs into the crack and is absorbed.
Mass movement The downward slope movement of earth caused by gravity.
lag time The time between rain falling and reaching the river.
Thalweg The fastest velocity in a meander.
Created by: Maddie16