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.

By signing up, I agree to StudyStack's Terms of Service and Privacy Policy.

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.

Remove ads
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

Chapter 4 Science

Lesson 1 Conserving Land and Soil

Litter The very top layer of fertile soil made of dad leaves and grass
Topsoil The crumbly, topmost layer of soil made up of clay and other minerals and humus (nutrients and decaying plant and animal matter)
Subsoil the layer of soil below topsoil that has less plant and animal matter than topsoil and contains mostly clay and other minerals
Bedrock Rock that makes up Earth's crust; also the solid rock layer beneath the soil
Erosion The process by which water, ice, wind, or gravity moves weathered particles of rock and soil
Nutrient Depletion The situation that arises when more soil nutrients are used than the decomposeres can spply
Fertilizer A substance that provides nutrients to help crops grow better
Desertification The advance of desert-like conditions into areas that previously were fertile; caused by over farming, overgrazing, drought, and climate change
Drought A long period of low precipitation
Land Reclamation The process of restoring land to a more natural, productive state
Created by: dguilliams