Review: Environmental Science Final Exam

Front

What indicates good water quality in an ecosystem?

Back

The presence of mayflies and stoneflies.

Front

What level of organization includes both living organisms and their physical environment?

Back

Ecosystem.

Front

What happens to energy as it moves from one trophic level to the next?

Back

Energy decreases.

Front

What term describes organisms that produce their own food?

Back

Autotroph.

Front

What is the effect on predator populations when prey populations decrease?

Back

The predator population decreases.

Front

What are organisms that cannot produce their own food called?

Back

Heterotrophs.

Front

What is the primary source of energy for most ecosystems?

Back

The sun.

Front

What is a food chain?

Back

A linear sequence of organisms through which nutrients and energy pass as one organism eats another.

Front

What is biodiversity?

Back

The variety of life in a particular habitat or ecosystem.

Front

What role do decomposers play in an ecosystem?

Back

They break down dead organic material, returning nutrients to the soil.