APES WATER UNIT TEST

You are selecting a new dishwater. You do about 150 loads per year. The less efficient model uses 9 gallons per load. The more efficient model uses 6 gallons per load. How much money will be saved on water if you select the more efficient model and the price of water is $0.75 per 1,000 gallons?

$0.34

You are selecting a new dishwater. You do about 150 loads per year. The less efficient model uses 9 gallons per load. The more efficient model uses 6 gallons per load. How many gallons of water will be saved over the course of one year?

450

Refer to the graph below: According to the graph, how much dissolved oxygen will there be when the water temperature is 15oC?

9.8 mg/L

The individual matters in terms of what can be done to help reduce water pollution. All of the following are things we can do, EXCEPT

Buy commercially produced foods

A new 450 unit housing development will replace several small farms on the outskirts of Fremont. The development will be composed of ¼ hectare lots with nearly identical footprints, as shown below: Stormwater runoff from the new development into nearby Samuel Creek will likely lead to which of the following?

Destruction of fish habitats by high levels of suspended solids and sediments

The use of nitrogen based fertilizers in the Midwestern United States is a major contributing factor to which of the following?

Hypoxia (low oxygen) in the Gulf of Mexico

Farmers can sharply reduce fertilizer runoff by I. Using prescribed amounts of fertilizer. II. Fertilizing only sloped areas, but not flat areas. III. Planting legumes (beans) and other nitrogen-fixing plants.

I and III only

What is/are advantages of dams and reservoirs. I. Capture and store runoff and release it as needed. II. Control downstream flooding. III. Can be used to generate electricity.

I,II and III

A new 450 unit housing development will replace several small farms on the outskirts of Fremont. The development will be composed of ¼ hectare lots with nearly identical footprints, as shown below: Which of the following will be the greatest impact of the development on the local water supply?

There will be less recharge of groundwater

A new 450 unit housing development will replace several small farms on the outskirts of Fremont. The development will be composed of ¼ hectare lots with nearly identical footprints, as shown below: One important step that homeowners in the new development can take to protect water quality in Samel Creek would be to

Use rain barrels to reduce the flow of storm water into the creek

see the bar graph below: Based on the information shown in the graph, which of the following statements is most likely to be true?

When precipitation varies, streams in watershed II experience the greatest fluctuations in water volume.