Ecosystems and Energy Relationships

Front

What is the role of weathering in the phosphorus cycle?

Back

To release small amounts of phosphate ions.

Front

Which of the following is NOT a component of the nitrogen cycle?

Back

Fossil fuel combustion.

Front

What is the role of an organism in a community?

Back

To interact with other species.

Front

How do human activities impact the carbon cycle?

Back

By burning fossil fuels and releasing excessive carbon back into the atmosphere.

Front

How do plants obtain nitrogen in the nitrogen cycle?

Back

By taking up nitrates and ammonium from the soil.

Front

Define an ecosystem.

Back

A community of living organisms interacting with their physical environment.

Front

What is the carbon cycle?

Back

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

Front

Explain nitrogen fixation.

Back

The process of converting atmospheric nitrogen gas into a form usable by plants, typically ammonium or nitrates.

Front

What is the significance of decomposers in an ecosystem?

Back

Decomposers break down dead organic matter, recycling nutrients back into the soil.

Front

Describe the process of photosynthesis.

Back

The process by which green plants use sunlight to convert carbon dioxide and water into glucose and oxygen.