Busy. Please wait.
or

Forgot Password?

Don't have an account?  Sign up 
or

taken
show password

why

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 email address associated with your account, and we'll email you a link to reset your password.

Remove ads
Don't know (0)
Know (0)
remaining cards (0)
Save
0:01
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:
Retries:
restart all cards




share
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

Exam Study guide

6th period

TermDefinition
natural resources products of earth that people use to meet their needs
renewable resources cannot be used up; can be replaced
nonrenewable resources cannot be replaced; limited supply
acid rain rain containing high amounts of chemical pollutants.
deforestation cutting down trees without replanting
conservation careful use of resources
ecosystems places where plants and animals are dependent upon one another and their surroundings to live.
death rate number of people out of every 1,000 who die in a year.
birth date number of children born every year for every 1,000 people
famine lack of food.
population density average number of people living in a square mile or kilometer
urbanization movement to cities
emigrate move to another country
refugee person who flees to another country to escape persecution or disaster.
developed country country in which a great deal of manufacturing is carried out.
developing country country that is working toward industrialization
atmosphere the blanket of gases, or air surrounding the earth.
lithosphere the earth's hard outer shell, or land.
hydrosphere all the water on earth.
biosphere all living things and the environments in which they live.
Created by: yohali