Biogeochemical Cycles Practice Test

Front

What is the main form of sulphur in the atmosphere?

Back

Sulphates

Front

Which of the following is a gaseous biogeochemical cycle?

Back

Carbon Cycle

Front

What process could move nitrogen from fertilizer into a local stream?

Back

Runoff

Front

Which element is released by plants during photosynthesis?

Back

Oxygen

Front

Which of the following is NOT a major element involved in biogeochemical cycles?

Back

Helium

Front

Define biogeochemical cycle.

Back

A biogeochemical cycle is the movement of elements and compounds through living organisms and the physical environment.

Front

What role do decomposers play in biogeochemical cycles?

Back

Decomposers break down dead organic matter, returning nutrients to the soil and making them available for plants.

Front

Explain nitrogen fixation.

Back

Nitrogen fixation is the process of converting atmospheric nitrogen (N2) into a form usable by plants, typically ammonia (NH3).

Front

What is the carbon cycle?

Back

The carbon cycle is the process by which carbon is exchanged between the atmosphere, land, water, and living organisms.

Front

How do plants contribute to the carbon cycle?

Back

Plants absorb carbon dioxide during photosynthesis and release oxygen as a byproduct.