Save
Upgrade to remove ads
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
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.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
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

Ch 18 sec 4

ch 18 se 4

QuestionAnswer
Biogeochemical cycle passing substances such as water, carbon, nitrogen, calcuim, and phosphorus between the living and nonliving worlds
Groundwater Water in the soil or in the underground formations of porous rock
Water Cycle The movement of water between various reservoirs
Transpiration Most of the water that evaporates from terrestrial ecosystems passes through plants in this process
Carbon Cycle Photosynthesis and cellular respiration form the basis of this short-term
Nitrogen cycle The complex pathway that nitrogen follows in an ecosystem
Nitrogen Fixation The process of converting N2 gas to nitrate
Nitrogen-fixing bacteria transforms nitrogen gas to a usable form
Ammonification Decomposers break down the urine and dung and release the nitrogen they contain as ammonia, NH3, which in soil becomes ammonium
Nitrification Soil bacteria take up ammonium and oxidize it into nitrites, NO2, and nitrates, NO3
Denitrification Nitrogen is returned to the atmosphere
Phosphirus cycle the movement of phosphorus from the environment to organisms and then back into the environment
Created by: celesteb34
Popular Biology sets

 

 



Voices

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:
Retries:
restart all cards