Science 6 -- Unit 6 Practice Test

Front

A ________ is often used to indicate the level of pollution in the water and how well the water can support aquatic plant and animal life.

Back

dissolved oxygen measurement

Front

Which human activity would have the greatest positive impact on the water quality of a stream?

Back

reducing use of fertilizers near the stream

Front

What could occur as a result of runoff of high nitrogen fertilizers from farmlands near a lake?

Back

An increase in algae growth resulting in low oxygen levels in the lake.

Front

Several conditions influence how much oxygen will be dissolved in water. What happens when photosynthesis increases and decay decreases?

Back

Dissolved oxygen will increase.

Front

Most of the water in Virginia's watersheds drains into

Back

the Chesapeake Bay.

Front

Select the largest watershed in Virginia: Potomac-Shenandoah, James, York, Roanoke.

Back

James

Front

Why are wetlands important?

Back

They filter pollutants out of water.

Front

Watersheds are separated by?

Back

divides

Front

Which two behaviors best demonstrate stewardship?

Back

reducing consumption, recycling wastes

Front

Scientists have found that high temperatures and lack of rainfall can result in a sharp decline in the number of fish in a lake. This is most likely an example of what process?

Back

abiotic factors decreasing the availability of resources