Front

What percentage of the atmosphere is nitrogen gas?

Back

78%

Front

Do cycles in nature have a beginning or an end?

Back

No, cycles do not begin or end.

Front

What is the consequence of excess phosphorus runoff into freshwater?

Back

It can lead to algal blooms, which causes eutrophication.

Front

How do decomposers contribute to the carbon cycle after an organism dies?

Back

Decomposers break the body down into simpler compounds, returning carbon to the environment.

Front

Where is the largest reservoir of water found on Earth?

Back

The ocean.

Front

What is the process called when nutrients from fertilizers cause excessive growth of algae in water bodies?

Back

Eutrophication.

Front

What role do decomposers play in nutrient cycling?

Back

They break down dead organic matter, returning nutrients to the soil and atmosphere.

Front

What is the primary gas that contributes to the greenhouse effect?

Back

Carbon dioxide (CO2).

Front

What is the significance of the water cycle in the environment?

Back

It regulates climate, supports plant growth, and maintains ecosystems.

Front

What are the main components of the carbon cycle?

Back

Photosynthesis, respiration, decomposition, and combustion.