Stability & Change in Ecosystems Version A

Front

What is the largest reservoir for the nitrogen cycle?

Back

The atmosphere.

Front

What is responsible for most environmental problems of excess nitrogen and phosphorus entering streams, lakes, and oceans?

Back

Agriculture & household runoff.

Front

Why is the cycling of matter important?

Back

Only a limited amount of matter is available, so it has to be recycled.

Front

How do animals obtain the nitrogen they need?

Back

By eating other organisms.

Front

Which of the following is NOT a process of the water cycle?

Back

Fixation.

Front

Define the nitrogen cycle.

Back

The nitrogen cycle is the process by which nitrogen is converted between its various chemical forms, including atmospheric nitrogen, organic nitrogen, and inorganic nitrogen.

Front

What role do bacteria play in the nitrogen cycle?

Back

Bacteria convert atmospheric nitrogen into forms that plants can use, such as ammonia.

Front

What is eutrophication?

Back

Eutrophication is the process by which water bodies become overly enriched with nutrients, leading to excessive growth of algae and depletion of oxygen.

Front

What is the significance of transpiration in the water cycle?

Back

Transpiration is the process by which water is absorbed by plants and released as vapor, contributing to the water cycle and regulating climate.

Front

What is the process of photosynthesis?

Back

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