Biogeochemical Cycles Review

Front

What is the main reason we cannot obtain nitrogen from the atmosphere by breathing?

Back

We have no mechanism to break the triple bond of nitrogen between the atoms.

Front

What is denitrification?

Back

The process where nitrogen compounds are converted into free nitrogen.

Front

Where are nitrogen-fixing bacteria primarily found?

Back

In root nodules of certain plants.

Front

Which biogeochemical cycle does NOT include an atmospheric component?

Back

Phosphorus cycle.

Front

What cycle is photosynthesis a crucial part of?

Back

Carbon cycle.

Front

What is the role of nitrogen-fixing bacteria in the nitrogen cycle?

Back

They convert atmospheric nitrogen (N2) into ammonia (NH3) which plants can use.

Front

What are the main components of the carbon cycle?

Back

Photosynthesis, respiration, decomposition, and combustion.

Front

How does phosphorus primarily enter the soil?

Back

Through weathering of rocks and minerals.

Front

What is the significance of the water cycle in ecosystems?

Back

It regulates climate, supports plant growth, and maintains water availability.

Front

What is the process of nitrification?

Back

The conversion of ammonia into nitrites and then nitrates by bacteria.