Question

1. what role do decomposers play in the carbon cycle?

a. they convert co₂ to glucose
b. they convert nitrogen to carbon
c. they store carbon in their shells
d. they release carbon dioxide through decomposition

1. which process in the nitrogen cycle converts atmospheric nitrogen into a usable form?

a. nitrogen fixation
b. denitrification
c. ammonification
d. nitrification

1. what happens to most precipitation that falls on land?

a. it seeps into groundwater
b. it runs off into oceans
c. it immediately evaporates
d. it freezes into glaciers

1. which organisms are primarily responsible for nitrogen fixation in soil?

a. bacteria
b. animals
c. plants
d. fungi

1. what process returns carbon dioxide to the atmosphere?

a. nitrogen fixation
b. infiltration
c. precipitation
d. cellular respiration

Explanation:

• Question 5: Decomposers break down organic matter and release carbon - dioxide back into the atmosphere through decomposition.
• Question 6: Nitrogen fixation is the process that converts atmospheric nitrogen into a usable form like ammonia.
• Question 7: Most precipitation that falls on land seeps into the groundwater through infiltration.
• Question 8: Certain bacteria in the soil are primarily responsible for nitrogen fixation.
• Question 9: Cellular respiration in organisms uses oxygen and glucose to produce carbon - dioxide, water, and energy, returning carbon - dioxide to the atmosphere.

Answer:

1. d. They release carbon dioxide through decomposition
2. a. Nitrogen fixation
3. a. It seeps into groundwater
4. a. Bacteria
5. d. Cellular respiration