Freshwater Unit Exam

These are all physical tests for water quality except..

• Turbidity

• Salinity

• Temperature

• BOD (biochemical oxygen demand)

Runoff of sewage and agricultural wastes into coastal waters cause which of the following?

• Algae growth

• Rainwater

• Surface runoff

• Oil spill

What two important nutrients are tested for in a body of water to check for eutrophication levels?

• Nitrates and Phosphates

• Dissolved Oxygen and pH

• Carbon Dioxide and Oxygen

• Nitrates and Dissolved Oxygen

A factory is located next to a river. The factory has a sewage pipe running straight out of the factory and into the river. This is an example of _________________.

• Point source pollution

• Non-point source pollution

• Tertiary receiving stream

• Primary treatment

Pollutants entering waterways from a general area, such as runoff from farmland or suburban communities

• Pollution

• Point source pollution

• Non-point source pollution

• Turbidity

"Turbidity" is the measure of a body of water's

• cloudiness

• eutrophication

• temperature change

• flocculation

Which of the following describes the correct order for the water treatment process?

• 1. Sedimentation 2. Chlorination 3. Filtration
• 1. Sedimentation 2. Filtration 3. Chlorination
• 1. Filtration 2. Chlorination 3. Sedimentation
• 1. Filtration 2. Sedimentation 3. Chlorination

Which statement is true about streamside vegetation?

• Trees provide shade, which makes water too cold for most animals

• Roots help stabilize shorelines, preventing erosion

• Leaves that fall into the water pollute the stream

• Plants along a stream steal oxygen from the animals

About 97% of the water on Earth is ___________

• Fresh Water

• Groundwater

• Salt Water

• Ice

_____________ washes agricultural wastes, including animal wastes, fertilizers, and pesticides into bodies of water, causing algae to grow.

• Runoff

• Peak flow

• Groundwater

• Municipal Sewage