Polluted Water

Q.

Give two examples each of a point source and non-point source of water pollution.

Q. Which of the activities cannot pollute the river water directly?

1. Dumping household garbage
2. Dumping chemicals from factories
3. Disposing water from factories
4. Growing aquatic organisms

Q. Elephants use their _____ to suck water for drinking and spraying water on themselves.

1. mouth
2. trunk
3. tail
4. feet

Q.

What is air and water pollution?

Q.

What are the Hazards of Bromine Water?

Q. Which of the following activities pollute water bodies?

1. Cleaning utensils
2. Bathing animals
3. Boiling water
4. Washing clothes

Q. The river water shown in the image is ________.

1. drinkable
2. clean
3. polluted
4. salty

Q. Potable water or safe drinking water can be obtained by

1. boiling the water
2. water purifiers
3. adding bleach solution in water
4. portable purifiers

Q. The water that looks clean is always fit for drinking.

1. False
2. True

Q.

Acid rain affects aquatic life.

1. True
2. False

Q. Identify the water that is unfit for drinking.

1. Sewage water
2. Tap water
3. River water
4. Sea water
5. Boiled water
6. Filtered water
7. Purified water
8. Industrial
   wastewater

Q. Addition of untreated industrial effluents to a water body makes it .

1. clean
2. polluted
3. populated
4. shrink

Q. Soil pollution leads to contamination of groundwater.

1. True
2. False

Q. Bathing in water bodies does not pollute water.

1. True
2. False

Q. There is no harm in drinking polluted water.

1. True
2. False

Q. We have very less water available to us.

1. polluted
2. salty
3. fresh

Q. Causes of water pollution are:

1. Industrial wastes
2. Sewage wastes
3. Rainfall
4. Oil spills

Q. The device given in the image is a .

1. water boiler
2. microscope
3. water purifier

Q. The device given in the image is a .

1. water boiler
2. microscope
3. water purifier

Q. Bathing in water bodies does not pollute water.

1. True
2. False

Q. We should not wash clothes in water bodies.

1. True
2. False

Q. a) List two examples of seeds that are used as food. (1 mark)

b) Mention the four characteristics on the basis of which seeds can be differentiated. (2 marks)

c) What could be done to keep rivers clean? Discuss. (2 marks)

Q. Which of the following activities do not make the river dirty?

1. Washing clothes
2. Bathing animals
3. Watering plants
4. Cleaning utensils

Q. Which activities do you observe in the following picture?

1. Defecating near water bodies
2. Bathing
3. Cleaning water
4. Throwing garbage