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Important Questions Chapter 6 Class 8 Science Curiosity CBSE Board

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Pressure, Winds, Storms, and Cyclones


Short Questions

1. What is pressure?
Answer:-  Pressure is the force applied per unit area.

2. What is the SI unit of pressure?
Answer:-  The SI unit is pascal (Pa) or N/m².

3. Why is it easier to carry bags with broad straps?
Answer:- Broad straps reduce pressure on shoulders.

4. Do liquids exert pressure?
Answer:-  Yes, liquids exert pressure on the bottom and sides of a container.

5. Why are overhead water tanks placed at a height?
Answer:-  To increase water pressure in taps.

6.What is atmospheric pressure?
Answer:-  It is the pressure exerted by air around us.

7.Why don’t we get crushed by air pressure?
Answer:-  Because pressure inside our body balances it.

8.What causes winds to blow?
Answer:-  Winds blow due to differences in air pressure.

9.What is a cyclone?
Answer:- A cyclone is a spinning system of clouds and strong winds.

10.What is the eye of a cyclone?
Answer:-  It is the calm centre of the cyclone.

11.What is a thunderstorm?
Answer:-  A storm with thunder, lightning, and heavy rain.

12.Why do boats with small base area feel more pressure?
Answer:-  Smaller area causes higher pressure.

13.What happens when high-speed winds blow over a roof?
Answer:-  A low-pressure area forms and the roof may blow away.

14.What is lightning?
Answer:-  A sudden flash caused by the movement of electric charges in clouds.

15. Why are holes made in hoardings during storms?
Answer:-  To reduce wind pressure and prevent tearing.


 Long Questions

1. How do high-speed winds cause roofs to fly away?
Answer:- High-speed winds create low pressure above roofs. The higher pressure below pushes the roof up and it may fly away.

2.Explain how liquids exert pressure.
Answer:- Liquids exert pressure at the bottom and sides of containers.This pressure increases with the height of the liquid column.

3.How does a cyclone form?
Answer:- Warm moist air rises, creating low pressure. Air rushes in and spins due to Earth’s rotation, forming a cyclone.

4.Describe the process of lightning.
Answer:- Rubbing of ice and water droplets creates electric charges.When opposite charges meet, lightning and thunder occur.

5.How does a sea breeze form?
Answer:- Land heats faster and forms low pressure.Cool air from sea flows to land, creating a sea breeze.

6.Why does water flow out of holes in a bottle?
Answer:- Water flows out due to pressure on the sides. This shows liquids exert pressure in all directions.

7.What precautions should be taken during lightning?
Answer:- Stay away from tall objects and water.Crouch down in an open area and avoid metal items.

8.What is the role of IMD during cyclones?
Answer:- IMD gives alerts and weather reports. This helps people prepare and stay safe.

9.What is atmospheric pressure and how can we feel it?
Answer:- Atmospheric pressure is the pressure of air around us.We feel it when using a rubber sucker or blowing balloons.

10.Why do strong winds cause more damage during cyclones?
Answer:- Strong winds create huge waves and floods. They also break trees, power lines, and damage houses.

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