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

Unit 3 Energy


autotroph organism that can capture energy from sunlight or chemicals and use it to produce its own food from inorganic compounds; also called a producer
heterotroph organism that obtains energy from the foods it consumes; also called a consumer
producer organism that can capture energy from sunlight and use it to produce food from inorganic compounds; also called an autotroph
consumer organism that relies on other organisms for its energy and food supply; also called heterotroph
chlorophyll principal pigment of plants and other photosynthetic organisms; captures light energy
thylakoid saclike photosynthetic membrane found in chloroplasts
stroma region outside the thylakoid membranes in chloroplasts
glycolysis first step in releasing the energy of glucose, in which a molecule of glucose is broken into two molecules of pyruvic acid
fermentation process by which cells release energy in the absence of oxygen
anaerobic process that does not require oxygen
aerobic process that requires oxygen
food chain series of steps in an ecosystem in which organisms transfer energy by eating and being eaten
food web network of complex interactions formed by feeding relationships among the various organisms in an ecosystem
trophic level step in a food chain or food web
ecological pyramid diagram that shows the relative amounts of energy or matter within each trophic level in a food chain or food web
biomass total amount of living tissue within a given trophic level
nitrogen fixation process of converting nitrogen gas to ammonia
denitrification conversion of nitrates into nitrogen gas
Created by: Batterbee