Environmental Scienc ...

Air

Question 1:  

Choose the correct answer and write in the blanks.

 1. Air is all ___________ us.

 2. We must keep the air ___________.

 3. Air helps to ___________ things.

 4. We cannot see air, but can ___________ it.

 5. We need air to ___________.

 6. Dirty air can make us ___________.

 7. ___________ help to keep the air clean.

 8. A soft wind is called ___________.

 9. A very strong wind is called ___________.

10. ___________ helps a kite to fly.

Answer:  

Choose the correct answer and write in the blanks.

 1. Air is all around us.

 2. We must keep the air clean.

 3. Air helps to move things.

 4. We cannot see air, but can feel it.

 5. We need air to live.

 6. Dirty air can make us sick.

 7. Trees help to keep the air clean.

 8. A soft wind is called breeze.

 9. A very strong wind is called storm.

10. Air helps a kite to fly.

Question 2:  

True/False

1. Moving air is called storm. ________ 

2. We can feel air only when it moves. ________

3. Dirty air makes us sick. ________

4. Animals and plants can live without air. ________

5. Wind turns the blades of the windmills. ________

6. We can see air. ________

7. We must cut trees to keep air clean. ________

8. We get fresh, clean air when there is smoke from vehicles. ________

9. Air also helps to move things. ________

10. Air gives shape to things. ________

Answer:

True/False

1. Moving air is called storm. False 

2. We can feel air only when it moves. True

3. Dirty air makes us sick. True

4. Animals and plants can live without air. False

5. Wind turns the blades of the windmills. True

6. We can see air. False

7. We must cut trees to keep air clean. False

8. We get fresh, clean air when there is smoke from vehicles. False

9. Air also helps to move things. True

10. Air gives shape to things. True

Question 3:  

Tick the correct answer.

1. Which of these is true about air? 

    a. We can feel it.    b. It moves things.    c. Both a and b 

2. Which of these gets its shape through air? 

    a. football     b. eraser     c. book

3. Which of these need air to move? 

    a. pencil     b. boats     c. spoon

4. Which of these is the strongest? 

    a. wind      b. breeze      c. storm

5. Which of these makes the air dirty?

    a. smoke      b. birds     c. trees

Answer:

Tick the correct answer.

1. Which of these is true about air? 

    a. We can feel it.    b. It moves things.    c. Both a and b 

2. Which of these gets its shape through air? 

    a. football     b. eraser     c. book

3. Which of these need air to move? 

    a. pencil     b. boats     c. spoon

4. Which of these is the strongest? 

    a. wind      b. breeze      c. storm

5. Which of these makes the air dirty?

    a. smoke      b. birds     c. trees

Question 4: 

Answer the following questions. 

Q1. What is wind?

Or

What is moving air called?

Ans. Moving air is called wind.

Q2. What is breeze?

Ans. A soft wind is called breeze.

Q3. What is called storm?

Ans. A very strong wind is called storm.

Q4. Can we feel air?

Ans. Yes, we can feel air when it moves.

Q5. Where can we find the air?

Ans. We can find the air all around us.

Q6. Name four things which can move or fly because of air.

Ans. kite, hot air balloon, yacht, paper

Q7. Why do we need air?

Ans. We need air to live. Air helps us to breathe.

Q8. How will you feel when you hold breath?

Ans. We will feel suffocated when we hold our breath.

Q9. Why should we plant more trees?

Ans. We should plant more trees because trees help to keep the air clean.

Q10. Why wet clothes dry faster on a windy day?

Ans. Wet clothes dry faster on a windy day because moving air helps clothes to dry.

Q11. How can you show that air occupies space with help of a balloon or a tyre-tube?

Ans. We can show that air occupies space by filling the air in a balloon or a tyre-tube. They get inflated.

Q12. How can you show that plants need air to live?

Ans. Keep a plant in jar and cover it with lid. The plant will die after a few days. It shows that plants need air to live.

Q13. Mention 3 ways in which air gets dirty.

Ans. 1. Smoke from burning things makes the air dirty.

2. Smoke from factories also makes the air dirty.

3. Buses, cars, trucks and auto-rickshaws also give off smoke that dirties the air.