Water Quality Physical Indicators

A body of water that has a high turbidity is

• A. cloudy

• B. clear

• C. basic

• D. acidic

Which of the following water pH levels is best for aquatic organism?

• A. 1.0

• B. 3.5

• C. 8.0

• D. 11.5

Tags

NGSS.MS-LS1-5

Which best describes a bioindicator?

• A. a species that has a short life span

• B. a species that depends on specific conditions to survive

• C. a species that can adapt to a variety of conditions

• D. a species that has been introduced to an ecosystem

If a body of water has low levels of dissolved oxygen, what can most likely be concluded?

• A. The water temperature is high.

• B. The water has a high salinity.

• C. The water has a high turbidity.

• D. The water has a low pH.

Tags

NGSS.MS-LS2-1

What is an indicator that a lake is healthy?

• A. a pH of 3.5

• B. a pH of 10.5

• C. low number of bio-indicators

• D. high number of bio-indicators

Which best explains the importance of dissolved gases in the ocean?

• A. They help control pollution.

• B. They help provide oxygen for aquatic animals.

• C. They help maintain a constant water temperature.

• D. They help maintain constant levels of salinity.

Which source most likely contains a large amount of nitrates and is non-potable?

• A. a water source near a hillside

• B. a water source with more leeches

• C. a water source near agricultural land

• D. a water source with more aquatic life

Which of the following are indicators of a healthy water source?

• A. high nitrates, high pH, and low temperature

• B. low temperatures, high dissolved oxygen and neutral pH

• C. low pH, high nitrates, and low dissolved oxygen

• D. high turbidity, high dissolved oxygen, and high temperature

Which factors are most characteristic of a healthy body of water?

• A. low salinity and high turbidity

• B. high pH and low dissolved oxygen

• C. high temperature and large quantities of algae

• D. low turbidity and high dissolved oxygen

What is the relationship between water temperature and dissolved oxygen?

• A. As water temperature goes up, the amount of dissolved oxygen increases.

• B. Water temperature has no effect on the amount of dissolved oxygen.

• C. The amount of dissolved oxygen decreases as water temperature decreases.

• D. Cold water can contain more dissolved oxygen than warm water can.