Biogeochemical Cycles

Front

What is the most abundant gas in the atmosphere?

Back

Nitrogen is the most abundant gas in the atmosphere, making up about 78% of the air we breathe.

Front

What role do bacteria play in the nitrogen cycle?

Back

Bacteria break down dead plants and animals, releasing nitrogen back into the atmosphere, which is essential for the growth of living organisms.

Front

Identify the cycle that involves the movement of carbon through the environment.

Back

The Carbon cycle involves the movement of carbon among the atmosphere, oceans, soil, and living organisms.

Front

Where are nitrogen-fixing bacteria primarily found?

Back

Nitrogen-fixing bacteria are primarily found in root nodules of certain plants, such as legumes.

Front

Which activity does not contribute to the increase of CO2 in the atmosphere?

Back

Planting trees does not add CO2 to the atmosphere; in fact, it helps absorb CO2.

Front

What is a biogeochemical cycle?

Back

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

Front

Name the four main biogeochemical cycles.

Back

The four main biogeochemical cycles are the water cycle, carbon cycle, nitrogen cycle, and phosphorus cycle.

Front

What is the water cycle?

Back

The water cycle is the continuous movement of water on, above, and below the surface of the Earth, involving processes like evaporation, condensation, and precipitation.

Front

How do plants contribute to the carbon cycle?

Back

Plants absorb carbon dioxide from the atmosphere during photosynthesis, converting it into organic matter.

Front

What is nitrogen fixation?

Back

Nitrogen fixation is the process of converting atmospheric nitrogen (N2) into a form that plants can use, primarily done by certain bacteria.