Water Quality

1. What is turbidity?

• The acidity of the water.

• The amount of heat in the water.

• The amount of oxygen in the water.

• The clearness or cloudiness of the water.

2. What is Dissolved Oxygen?

• The amount of oxygen in the water.

• The clearness or cloudiness of the water.

• The amount of heat in the water.

• The acidity of the water.

True or False- High levels of dissolved oxygen indicate or show a healthy water supply.

• True

• False

What is the healthy pH level for potable water?

• 2

• 7

• 14

• 5

How are watersheds and river basins related?

• Many river basins flow into a watershed.

• Watersheds and river basins do not relate.

• Many watersheds flow into a river basin.

• Watersheds are the same as river basins.

Tags

NGSS.MS-ESS2-4

If there is a large number of living organisms in and around a water supply, then could the water supply be considered healthy?

• No, because it contains nitrates.

• No, because it contains living organisms.

• Yes, because it contains bioindicators, which are used to assess the health of a water supply.

• Yes, because it contains nitrates, which are used to assess the health of a water supply.

Which of the following is the best example of a source of POINT POLLUTION?

• Pet owners leaving waste on the ground.

• Runoff from farms that brings animal waste into a stream.

• Home owners washing cars near a storm drain.

• A fabric company that pours extra dye into a nearby stream

What factors directly lead to unhealthy levels of nitrates in the water? (Select all that apply)

• Fertilizer Runoff

• Animal Waste Runoff

• Loose soil

• Acid rain

Tags

NGSS.MS-ESS3-4

How does temperature relate to dissolved oxygen levels?

• Lower temperatures leads to higher levels of dissolved oxygen.

• Lower temperatures leads to lower levels of dissolved oxygen.

• Higher temperatures leads to higher levels of dissolved oxygen.

• Temperature and dissolved oxygen do not relate.

Which of the following statements best explains why nonpoint pollution is so difficult to prevent?

• Because nonpoint pollution can be traced to only one source.

• Because the source of nonpoint pollution is difficult to identify.

• Because the source of nonpoint pollution may be a factory that can afford large fines.

• Because nonpoint pollution is mainly from high temperature, which is impossible for us to affect.