Class 3 Exam > Class 3 Notes > Science for Class 3 > Worksheet: Air and Water
Class 3 Science - Air and Water - CBSE Worksheets
Multiple choice questions
Question 1: Which gas is used by the plants when they make food?
(a) Oxygen
(b) Carbon dioxide
(c) Nitrogen
(d) Water vapour
Question 2: How much of the Earth’s surface is covered with water?
(a) 25%
(b) 97%
(c) 71%
(d) 1%
Question 3: Water is found in this form:
(a) Solid
(b) Liquid
(c) Gas
(d) All of these
Question 4: Which of these is true for burning?
(a) Oxygen is formed.
(b) Carbon dioxide is formed.
(c) Carbon dioxide is used up.
(d) Oxygen and carbon dioxide are neither formed nor used up.
Question 5: Which of the following helps to save water?
(a) Using a hose pipe to water plants.
(b) Closing the tap while brushing your teeth.
(c) Throw away the water used to wash vegetables and fruits.
(d) Using a shower to bathe.
Fill in the blanks
Question 6:
(a) Air is a _________________ of gases.
(b) All living things need _________________ to breathe.
(c) Flowing water is used to generate _________________ .
(d) When wind moves gently it is called _________________ .
(e) Ice melting from _________________ feeds rivers and lakes.
Match the following
Question 7:
(a) Windmill (i) Drinking water
(b) Potable water (ii) Solid state
(c) Oxygen (iii) Storm
(d) Ice cube (iv) Electricity
(e) Strong wind (v) Breathing
True & False
Question 8:
- Earth is also called as green planet.
- Potable water is the water which is safe to drink
- We should use hose pipes to clean our cars.
- Air is required for burning.
- Plants do not need water for making their food
Answer the following questions in brief
Question 9: What is air? What does air contain?
Question 10: Write any three uses of air.
Question 11: What are the sources of water?
Question 12: What are the three states in which water can be found in? 5. Mention five ways to save water.
Observe the following image and answer the questions given below.
Question 13: Identify the two gases A and B shown in the given image.
(a) _______________
(b) _______________
Question 14: Name the two processes shown in the given image.
_______________
You can access the solutions to this worksheet here.
The document Class 3 Science - Air and Water - CBSE Worksheets is a part of the Class 3 Course Science for Class 3.
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FAQs on Class 3 Science - Air and Water - CBSE Worksheets
| 1. What are the main uses of air in our daily lives? |  |
Ans. Air is essential for breathing; humans and animals need it to live. It is also used in processes like combustion (e.g., burning fuel for cars), in making sound (as it carries sound waves), and in various industries like manufacturing.
| 2. Why is water important for living things? | |
Ans. Water is crucial for all living organisms. It helps in digestion, regulates body temperature, and transports nutrients. Additionally, plants need water for photosynthesis, which is how they make their food.
| 3. How can we conserve water at home? | |
Ans. We can conserve water by taking shorter showers, fixing leaks in taps and pipes, using water-efficient appliances, and collecting rainwater for gardening. Every drop counts!
| 4. What is air pollution and how does it affect us? | |
Ans. Air pollution is the presence of harmful substances in the air we breathe, such as smoke, dust, and chemicals. It can lead to health problems like asthma and other respiratory issues, and it can also harm the environment.
| 5. What are some ways to keep air clean? | |
Ans. We can keep the air clean by reducing vehicle emissions, using public transport, planting trees, and avoiding burning waste. Supporting renewable energy sources also helps reduce air pollution.
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Dec 22, 2024 Last updated |
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