Question 1
What is a biogeochemical cycle?
Question 2
Which of the following is an example of a reservoir in a biogeochemical cycle?
Question 3
In the carbon cycle, which process removes $CO_2$ from the atmosphere and stores carbon in living organisms?
Question 4
Why is the nitrogen cycle important to ecosystems?
Question 5
Which process in the nitrogen cycle is carried out by bacteria that convert atmospheric $N_2$ into ammonium?
