Freshwater Quality

The hydrosphere is predominantly made of 

• gaseous air
• solid rock
• liquid water
• frozen water

Tags

NGSS.MS-ESS2-4

What is one way to get groundwater to the surface?

• inflitration
• evaporation
• wells 
• runoff 

Which of the following could be either a point or non-point source of water pollution in North Carolina?

• oil tanker spills
• sewer treatment discharge
• storm water drainage
• illegal dumping

Tags

NGSS.HS-LS2-7

Which would a scientist expect to find in a lake that experienced a sudden increase in nitrate levels?

• an increase in temperature
• an increased number of fish
• an increase in dissolved oxygen
• an increased amount of algae and aquatic plants

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Which best explains the importance of pH in determining the health of a water system?

• Most organisms living in water are able to adapt to changing water pH.
• Variations in the pH of water can indicate the presence of toxicsubstances.
• A low pH in ground water encourages the growth of photosyntheticorganisms.
• Variations in the pH of water can affect the ability of water to absorbatmospheric gases.

Which most likely makes fish excellent indicators of watershed health?

• Fish live only for a short period of time.
• Fish live in the water for at least a portion of their life.
• Fish differ in their tolerance to amount and types of pollution.
• Fish are frequently moving throughout different columns of water.

Why is it important to monitor turbidity levels of a water system?

• Frogs will destroy fish eggs in murky water.
• Fish are better able to find food in cloudy water.
• Water can only be used for recreation when it is clear.
• Suspended particles diffuse sunlight and absorb too much heat.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-1

NGSS.MS-LS2-4

The local middle school has a fish pond in the courtyard. The pond water is suffering from eutrophication. Which most likely caused this problem?

• poor filtration
• direct sunlight
• fertilizer runoff
• improper cleaning

Tags

NGSS.MS-LS2-4

Which would lead to the greatest reduction of dissolved oxygen in a lake?

• decreased number of fish in the lake
• increased number of fish in the lake
• increased nutrients and algal blooms
• decreased number of plants surrounding the lake

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which aspect of stream ecology would be most affected by changes in water temperature?

• water flow rate
• coloration patterns of fish
• energy transfer in the food chain
• rate at which algae photosynthesizes

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

NGSS.MS-LS2-4