Class 5 Science Air and Water worksheet / test paper based on chapter . It includes all types of questions — MCQs, Fill in the Blanks, True/False, Match the Following, Short and Long Answers — as per school test format for Class 5 .
Section A – Multiple Choice Questions (1×10 = 10 marks)
1. Which gas is most present in air?
a) Oxygen
b) Carbon dioxide
c) Nitrogen
d) Helium
2. The air layer closest to the Earth is called:
a) Stratosphere
b) Troposphere
c) Mesosphere
d) Exosphere
3. Which method removes soluble impurities from water?
a) Filtration
b) Sedimentation
c) Evaporation
d) Decantation
4. Which gas is used in balloons because it is lighter than air?
a) Oxygen
b) Carbon dioxide
c) Helium
d) Neon
5. Which layer protects us from harmful UV rays?
a) Mesosphere
b) Ozone layer
c) Troposphere
d) Exosphere
6. Which of these helps in pollination?
a) Water
b) Oxygen
c) Air
d) Nitrogen
7. Alum is used in which water purification method?
a) Distillation
b) Filtration
c) Loading
d) Evaporation
8. Which property of air is shown by inflating a balloon?
a) Air has colour
b) Air has taste
c) Air occupies space
d) Air is hot
9. Which gas helps in burning?
a) Nitrogen
b) Oxygen
c) Argon
d) Helium
10. Chlorine is added to water to:
a) Add colour
b) Remove smell
c) Kill germs
d) Add minerals
Section B – Fill in the Blanks (1×10 = 10 marks)
1. The Earth is surrounded by a thick layer of air called the ___________.
2. __________% of air is nitrogen.
3. The ozone layer is found in the ___________ layer.
4. The process of pouring clean water after sedimentation is called ___________.
5. The air layer where weather changes happen is the ___________.
6. A mixture of gases that we breathe is called ___________.
7. The cleanest form of water is ___________ water.
8. ___________ helps oxygen reach fire to keep it burning.
9. The method to remove germs from water at home is ___________.
10. ___________ gas is used in making bulbs.
Section C – True or False (1×10 = 10 marks)
1. Air has colour, taste and smell.
2. Air can be felt but cannot be seen.
3. Exosphere is the closest layer to the Earth.
4. Sedimentation removes soluble impurities.
5. Plants use carbon dioxide for photosynthesis.
6. Air does not exert pressure.
7. Water covers about 70% of the Earth’s surface.
8. Oxygen makes up 78% of the air.
9. Air helps in the process of drying clothes.
10. The process of heating water to remove germs is called boiling.
Section D – Match the Following (1×10 = 10 marks)
Match Column A with Column B:
| Column A | Column B |
| — | – |
| A. Helium | i. Burning |
| B. Oxygen | ii. Filled in balloons |
| C. Decantation | iii. Filtering dirt |
| D. Filtration | iv. Pouring after sedimentation |
| E. Troposphere | v. Weather changes occur here |
| Column A | Column B |
| — | – |
| F. Chlorine | vi. Kills germs |
| G. Ionosphere | vii. Reflects radio waves |
| H. Nitrogen | viii. 78% of air |
| I. Neon | ix. Used in signboards |
| J. RO purifier | x. Home water purifier |
Section E – Answer in 2-3 sentences each: (3×5 = 15 marks)
1. What is atmosphere?
2. What are the characteristics of air?
3. What is sedimentation and decantation?
4. Write any three uses of air.
5. What is filtration? How is it done?
Section F – Answer in 5-6 sentences each: (5×5 = 25 marks)
1. Explain the five layers of the atmosphere.
2. Describe the composition of air.
3. What are the different methods used to clean water at home and in water works?
4. What is air pressure? Explain with any one activity.
5. How is distilled water prepared? Write steps of distillation.
Class 5 Science Air and Water worksheet Answer Key
Section A – Multiple Choice Questions (1×10 = 10 marks)
