Class 1st — Science

Chapter 2: Air Around Us

हमारे चारों ओर की हवा

📚 Chapter Theory & Introduction

Air is everywhere around us. All living things need air to live. We cannot see air, we cannot taste air, but we can feel it when it moves!

हवा हमारे चारों ओर हर जगह मौजूद है। सभी जीवित चीजों को जीने के लिए हवा की जरूरत होती है। हम हवा को देख नहीं सकते, लेकिन जब यह चलती है तो हम इसे महसूस कर सकते हैं।

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Moving Air Helps Things Move (चलती हवा चीजों को उड़ाती है)

1. What is Wind? (पवन क्या है?)

Moving air is called Wind. When air moves gently, it is called a Breeze. When it moves very fast, it is called a Storm.

चलती हुई हवा को पवन (Wind) कहते हैं। जब हवा धीरे-धीरे चलती है, तो इसे समीर (Breeze) कहते हैं, और बहुत तेज हवा को तूफान (Storm) कहते हैं।

2. Uses of Air (हवा के उपयोग)

1. Breathing (सांस लेना)

Humans, animals, and plants need air to breathe and stay alive.

इंसान, जानवर और पौधों को सांस लेने और जीवित रहने के लिए हवा की जरूरत होती है।

2. Filling Things (चीजें फुलाना)

We fill air inside footballs, balloons, bicycle tyres, and swimming tubes.

हम फुटबॉल, गुब्बारे, साइकिल के टायर और तैरने वाली ट्यूब में हवा भरते हैं।

3. Flying and Moving (उड़ने और चलने में मदद)

Air helps kites to fly high, birds to fly, and sailboats to move on water.

हवा पतंग उड़ाने, पक्षियों को उड़ने और नाव को पानी पर चलाने में मदद करती है।

4. Drying Clothes (कपड़े सुखाना)

Moving air helps our wet clothes dry faster outside.

चलती हवा हमारे गीले कपड़ों को जल्दी सुखाने में मदद करती है।

📝 Class Exercise (20 IMP Questions)

Click on the "Check Answer" button to see the correct answer.

Q1. Can we see air?

Answer: No, we cannot see air, we can only feel it.

Q2. What is moving air called?

Answer: Moving air is called Wind.

Q3. Do plants need air to live?

Answer: Yes, plants need air to live and make food.

Q4. Name two things we can blow air into.

Answer: Balloons and Footballs.

Q5. What do we call a very strong and fast-moving air?

Answer: It is called a Storm (तूफान).

Q6. What is a gentle and soft wind called?

Answer: It is called a Breeze (समीर).

Q7. Where is air present?

Answer: Air is present everywhere around us.

Q8. Does air help in flying a kite?

Answer: Yes, air moves the kite up in the sky.

Q9. Why do we need to pump air into bicycle tyres?

Answer: To make the tyres round and hard so the bicycle can move smoothly.

Q10. True or False: Fish do not need air inside water.

Answer: False. Fish breathe air dissolved in water using their gills.

Q11. Does air have any color?

Answer: No, air is colorless.

Q12. What happens when you leave a balloon open after blowing air into it?

Answer: The air rushes out immediately.

Q13. Can we feel air when we sit under a running fan?

Answer: Yes, the fan moves the air, and we can feel it on our skin.

Q14. Why do clothes dry outside on a windy day?

Answer: Because wind carries away the water from wet clothes quickly.

Q15. True or False: Animals can live without air for days.

Answer: False. No animal can survive without air.

Q16. What gives shape to a deflated football?

Answer: Filling air into it gives it shape.

Q17. Does a sailboat need air to move?

Answer: Yes, the wind pushes the sails to make the boat move.

Q18. What do human beings take in while breathing air?

Answer: We take in Oxygen gas from the air.

Q19. Can a candle burn without air?

Answer: No, air is needed for burning things.

Q20. What should we do to keep the air around us clean?

Answer: We should plant more green trees.

🧠 Interactive Lesson Quiz

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