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

Env. chap.9


professionals who study and make predictions about human populations are called? demographers
which factor contributed most to the expotential grownth of the human population more food, better hygiene
educating women worldwide has lowered birthrates partly because? because they don't have to bear with children
the 1991 cholera outbreak in Lima, Peru was caused by? unmanaged water sources
an increase in waterborne diseases could possibly be alleviated by? by boiling water
between 1880 and 1930 human population dopubled due to? because migration increased
which disease is often spread through unsafe public water sources? water borne parasites or other diseases
what is a reason that wood is considered a limitted resource in many developing countries? trees are sometimes cut down for fuelwood when there are no dead trees already
scientist predict population sizes by using age structure, suvivorship, fertility rate, and what other thing? migration
Created by: amarantha