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


autotroph A producer; a living organism that makes its own food using energy from the light
heterotroph A consumer; a living organism that needs to eat food to gain energy
producer A living organism that makes its own food
consumer A living organism that gets/eats its food
decomposer A living organism that breaks down waste or decaying material in order to get nutrients to stay alive
population A group of one type of living organism. Ex) humans or pandas
mutualism When both organisms benefit from the relationship. Ex) bees and flowers
parasitism When one organism benefits while hurting another. Ex) tick and dog
commensalism When one organism benefits and the other one doesn't care / isn't affected.