Class 5 Science Air , Water and Weather all exercises

Class 5 Science chapter 12 Air , Water and Weather all 

Very Short Answer

1. What is the upper most layer of the atmosphere called ?

Ans. Exosphere

2. What is the percentage of nitrogen in the air ?

Ans. 78%

3. How is water vapour formed ?

Ans. Water vapour is formed due to the evaporation of water from different water bodies.

4. What is atmospheric pollution called ?

Ans. When harmful gases mixed into the atmosphere , it is called Atmospheric pollution.

5. Name a solute.

Ans. Salt

6. Name the process which removes soluble impurities of water.

Ans. Evaporation, Distillation

7. Which gas is used to kill germs present in water ?

Ans. Chlorine Gas

8. How do we make water pure at our home ?

Ans. At our home, we make water pure by boiling it or by using water filters.

Short answer type Questions.

1. What is atmosphere ?

Ans. There is a thick layer of air around the earth which is called Atmosphere.

2. Name the five layers of the atmosphere.

Ans.The atmosphere is divided into five layers.They are - troposphere, stratosphere, mesosphere, thermosphere, and exosphere.

3. Name the gases found in Air.

Ans. Air is a mixture of many gases such as oxygen, carbon-dioxide, nitrogen and some other gases.

4. How is oxygen important for the living things ?

Ans. Oxygen is important for the living things for breathing.

5. Name five properties of air.

Ans. Air has weight, Air occupies space, Air exerts pressure, Air helps in burning. 

6. Write five uses of water.

Ans. For cooking, For Drinking, For washing clothes, For fire brigade, For Bathing.

7. What are insoluble impurities?

Ans. The impurities that do not mix or dissolve in water are called insoluble impurities. For Eg: Sand, Dirt etc. 

8. What is distillation ?

Ans. The process of purifying water by first boiling it and then condensing the steam is called distillation.

9. What is filtration ?

Ans. Filtration is the process of making the water pure by passing it through a filter paper.

10. What is Sedimentation ?

Ans. Sedimentation is a process of settling down of heavy insoluble impurities at the bottom of the water.

11. What happen when Chlorine gas is passed through water ?

Ans. When Chlorine gas is passed through water it kill the germs present in it.