Water Pollution
Water Pollution: Overview
This topic explains concepts such as Water Pollution, Water Pollutants, Causes of Water Pollution, Sewage, etc.
Important Questions on Water Pollution
The table shows the properties of four water samples.
| Water Sample | Smell | Colour |
| Sample 1 | No smell | Slightly muddy |
| Sample 2 | Strong bad smell | Muddy and greenish |
| Sample 3 | Very light smell | Colourless |
| Sample 4 | No smell | Colourless |
In which water source will the survival of aquatic animals be the most difficult?
Seema fills four similar fish tanks with freshwater from different sources. She puts six freshwater fish in each tank. The table shows her findings after two days.
| Tank | Findings |
| Tank 1 | All fish are dead. |
| Tank 2 | 1 fish is dead, and 5 fish are alive. |
| Tank 3 | All fish are alive. |
| Tank 4 | 2 fish are dead, and 4 fish are alive. |
Seema repeats the activity by putting only one fish in each tank. Can she rely on the results this time? Explain your answer.
Seema fills four similar fish tanks with freshwater from different sources. She puts six freshwater fish in each tank. The table shows her findings after two days.
| Tank | Findings |
| Tank 1 | All fish are dead. |
| Tank 2 | 1 fish is dead, and 5 fish are alive. |
| Tank 3 | All fish are alive. |
| Tank 4 | 2 fish are dead, and 4 fish are alive. |
Which tank is likely to have been filled with the most polluted water?
Domestic wastes, insecticides and herbicides are examples of water pollutants.
Discuss the advantages of aeration in wastewater treatment plant.
Describe the process of Aeration in polluted water.
Explain how the treated water is disinfected in the wastewater treatment plants.
Explain the first method in the treatment of polluted water.
The method of prevention of water pollution from an industrial perspective is:
Fill in the blank using the words given in the box:
| Diarrhoea cleans dirty Kali Bein urbanisation |
Water Treatment Plant _____ the dirty water.
Fill in the blank using the words given in the box:
| Diarrhoea cleans dirty Kali Bein urbanisation |
The water gets _____ after domestic use.
Name the process in which the water is usually sprayed through air.
Seawater contains many natural salts. Do these salts pollute the sea?
Which of the following is a point source of water pollution?
Peter is camping with his family near a stream in a wooded area. During his stay in the camp he throws all the plastic waste into the stream. What is wrong with this?
