Water pollution

Q.

What do you mean by thermal pollution? Describe its harmful effects on organisms.

Q. Which of these are important man-made sources of water pollution?

1. Soil erosion
2. Volcanic eruption
3. Industrial effluents
4. Landslides

Q. Which of these measures will not help in controlling water pollution?

1. Treatment of industrial effluents
2. Keeping drinking water sources clean
3. Establishment of sewage treatment plants
4. Uncontrolled disposal of waste into water bodies

Q. Which of these is not a kind of water pollution?

1. Ground water pollution
2. River water pollution
3. Sea or Ocean water pollution
4. Rain water pollution

Q.

Discuss the steps that can be adopted to prevent water pollution.

Q. What should be done to reduce water pollution due to sewage and industrial waste?

Q. Which of these are important man-made sources of water pollution?

1. Soil erosion
2. Volcanic eruption
3. Landslides
4. Industrial effluents

Q. Which of the following have harmful effects on both human and aquatic life?

1. Water pollution
2. Air pollution
3. Soil pollution
4. Noise pollution

Q. Identify the important effects of water pollution.

1. It affects irrigation water.
2. It causes death of aquatic life.
3. It spreads water-borne diseases and epidemics.
4. It disrupts the natural food chain.