Busy. Please wait.
Log in with Clever

show password
Forgot Password?

Don't have an account?  Sign up 
Sign up using Clever

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.
Your email address is only used to allow you to reset your password. See 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.
Didn't know it?
click below
Knew it?
click below
Don't Know
Remaining cards (0)
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


Flash cards on environmental challenges

Megalopolis Areas were cities have grown so large they run into each other
Developing cities Countries seeking to industrialize, but still wanting to follow traditional ways
Developed countries Have long been industrialized and can offer a higher standard of living
Deforestation The clearing of forests
Habitat The special environments required for particular organisms to live
Desertification Turning fertile land into deserts
Substance farmers Growing just enough food to meet their needs
Slum The rundown poverty stricken portions of the city
No renewable resource Takes millions of years to produce and once its all used up its gone forever
Acid rain Poisonous downpours that have killed forests in both North America and Europe
Greenhouse effect The gasses trap solar energy in the form of heat
Chlorofluorocarbons The gasses used in aerosols, air conditioner, refrigerators, and foam packaging has also raised concern among scientists
Ozone layer Absorbs most of the suns cancer-causing ultraviolet radiation
Ozone hole A hole that forms over Antarctica and starts to form in August and reaches its largest size by October
Sustainable development Economic development that does not limit the ability of future generations to meet their needs
Green revolution A solution to feed the worlds population
Created by: Nicholas Murphy
Popular History sets




Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
restart all cards