Water Resources

Which correctly identifies an example of a point source pollution and an example of a nonpoint source pollution?

• Point: waste dumped from sewage plants; Nonpoint: oil spills

• Point: agricultural runoff; Nonpoint: acid rain

• Point: oil spills; Nonpoint: deforestation

• Point: acid rain; Nonpoint: agricultural runoff

Answer explanation

Point source pollution is a single, identifiable source, like oil spills. Nonpoint source pollution comes from multiple sources, such as deforestation, which leads to runoff. Thus, the correct identification is Point: oil spills; Nonpoint: deforestation.

The image shows a rain barrel that is connected to the gutters of a building to collect rainwater to be reused for things like watering plants and outdoor cleaning. How can a rain barrel help manage water resources?

• It is a technology that helps purify water to be reused again.

• It increases the efficiency of how water is used which ultimately reduces the total amount of water a household uses.

• It is a technology that replaces a household's need for purified water.

• It is a conservation method that can help reduce the amount of purified water a household uses.

Answer explanation

A rain barrel conserves water by collecting rainwater, which can be used for non-potable purposes like watering plants. This reduces the reliance on purified water, making it an effective conservation method.

Which of the following is a management method that can help conserve water and reduce runoff caused by farming?

• Crop rotation, where farmers plant different crops based on the season to improve the soil health and optimize nutrients in the soil.

• Tilling, this allows for better absorption, farmers dig up the land after each growing session to remove weeds and roots.

• Fertilizing, where farmers add nutrients to the soil to increase crop production and health.

• Overgrazing, where animals are allowed to excessively eat plants which reduce ground cover.

Answer explanation

Tilling improves soil absorption by breaking up the ground, which helps retain water and reduces runoff. This method enhances water conservation compared to the other options listed.

Tags

NGSS.MS-LS2-5

Which of the following would help conserve water resources? Choose all correct answers.

• A. Taking shorter showers.

• B. Watering outdoor plants daily.

• C. Turning off faucets when not in use.

• D. Washing the car weekly.

Answer explanation

Taking shorter showers (A) and turning off faucets when not in use (C) both reduce water waste, helping to conserve water resources. Watering plants daily (B) and washing the car weekly (D) can lead to excessive water use.

Look at the image of water stress projections around the world. Resource management of water is a global concern. How can technology be used to help manage water resources? Provide one example to support your answer.

Answer explanation

Technology can enhance water resource management through smart irrigation systems. For example, sensors can monitor soil moisture levels, optimizing water usage in agriculture and reducing waste.

Tags

NGSS.MS-ESS2-4

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

Look at the diagram of the wastewater treatment plant. Wastewater treatment plants are located near some cities. How do wastewater treatment plants help conserve water resources?

Answer explanation

Wastewater treatment plants help conserve water resources by treating and recycling wastewater, making it safe for reuse in irrigation and industrial processes, thus reducing the demand for fresh water.

Tags

NGSS.MS-ESS3-4

NGSS.MS-ETS1-3