CBSE Class 8 Science Chapter 6: Pressure, Winds, Storms, and Cyclones — Assertion & Reason
CBSE Class 8 Science Assertion & Reason
Expert crafted · Instant PDF download · 2026-27
The following Assertion and Reason questions are based on Chapter 6: Pressure, Winds, Storms, and Cyclones from the NCERT Class 8 Science textbook Curiosity. Each question has four options — read both the Assertion (A) and Reason (R) carefully before selecting your answer.
How to attempt Assertion & Reason questions:
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is NOT the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is NOT the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Assertion & Reason Questions
1
Assertion (A): A bag with broad straps is more comfortable to carry than a bag with narrow straps, even when both bags have the same weight.
Reason (R): Broad straps increase the area over which the weight of the bag acts, thereby reducing the pressure on the shoulders.
Reason (R): Broad straps increase the area over which the weight of the bag acts, thereby reducing the pressure on the shoulders.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. Since pressure is force per unit area, increasing the area reduces the pressure exerted on the shoulders, making it more comfortable.
2
Assertion (A): It is easier to hammer a nail into wood using its pointed end rather than its blunt head.
Reason (R): The pointed end has a smaller area, which results in higher pressure for the same force.
Reason (R): The pointed end has a smaller area, which results in higher pressure for the same force.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. When the same force is applied over a smaller area (pointed end), the pressure increases significantly, making it easier to penetrate the wood.
3
Assertion (A): Overhead water tanks are always placed at a height.
Reason (R): The pressure exerted by a liquid depends on the height of its column.
Reason (R): The pressure exerted by a liquid depends on the height of its column.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. Greater height of the water column creates higher pressure at the taps, resulting in a good stream of water.
4
Assertion (A): Liquids exert pressure only at the bottom of the container.
Reason (R): Liquids exert pressure in all directions — at the bottom and on the sides of the container.
Reason (R): Liquids exert pressure in all directions — at the bottom and on the sides of the container.
Answer: (d)
A is false, but R is true. Liquids exert pressure not only at the bottom but also on all sides of the container, as demonstrated by water flowing out from holes made on the sides of a bottle.
5
Assertion (A): The base of a dam is made much broader than the top.
Reason (R): The broad base helps the dam withstand the large horizontal water pressure that acts near the bottom.
Reason (R): The broad base helps the dam withstand the large horizontal water pressure that acts near the bottom.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. Water stored in the dam exerts very high horizontal pressure near the bottom due to the height of the water level, so the base must be broader to withstand this pressure.
6
Assertion (A): A rubber sucker sticks firmly to a smooth flat surface when pressed.
Reason (R): When pressed, most of the air between the sucker and the surface is pushed out, creating lower pressure inside than outside.
Reason (R): When pressed, most of the air between the sucker and the surface is pushed out, creating lower pressure inside than outside.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. The higher atmospheric pressure outside pushes the sucker against the surface, making it stick firmly.
7
Assertion (A): We are not crushed by the large atmospheric pressure acting on us.
Reason (R): The pressure inside our bodies is equal to the atmospheric pressure, which balances the external pressure.
Reason (R): The pressure inside our bodies is equal to the atmospheric pressure, which balances the external pressure.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. The internal pressure caused by fluids and gases in our tissues and organs balances the external atmospheric pressure.
8
Assertion (A): Wind is formed due to differences in air pressure.
Reason (R): Air moves from regions of high pressure to regions of low pressure.
Reason (R): Air moves from regions of high pressure to regions of low pressure.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. Pressure differences in the atmosphere cause air to flow from high-pressure areas to low-pressure areas, creating wind.
9
Assertion (A): During the day, sea breeze blows from the sea towards the land.
Reason (R): Land heats up faster than water during the day, creating a high-pressure area over the land.
Reason (R): Land heats up faster than water during the day, creating a high-pressure area over the land.
Answer: (c)
A is true, but R is false. Land heating faster creates a LOW-pressure area (not high-pressure) over the land as warm air rises. Air then flows from the high-pressure region over the sea to the low-pressure region over the land.
10
Assertion (A): High-speed winds are accompanied by reduced air pressure.
Reason (R): When high-speed winds blow over houses, they may blow off weak roofs.
Reason (R): When high-speed winds blow over houses, they may blow off weak roofs.
Answer: (b)
Both A and R are true, but R is NOT the correct explanation of A. While both statements are true, R describes a consequence of high-speed winds creating low pressure, not the reason why high-speed winds accompany reduced pressure.
11
Assertion (A): It is safer to keep doors and windows open during storms with high-speed winds.
Reason (R): Opening doors and windows reduces the pressure difference between the inside of the house and over the roof.
Reason (R): Opening doors and windows reduces the pressure difference between the inside of the house and over the roof.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. When wind moves over the roof and through the house, the pressure difference is reduced, helping prevent roofs from being blown off.
12
Assertion (A): Lightning is caused by the collision of opposite electric charges.
Reason (R): Strong winds moving upwards and downwards cause water droplets and ice particles to rub against each other, developing static electric charges in clouds.
Reason (R): Strong winds moving upwards and downwards cause water droplets and ice particles to rub against each other, developing static electric charges in clouds.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. The rubbing creates charge separation in clouds, and when the buildup becomes large enough, opposite charges collide, producing lightning.
13
Assertion (A): Thunder is heard after seeing the flash of lightning.
Reason (R): Lightning rapidly heats the air around it, causing the air to expand and produce the loud sound of thunder.
Reason (R): Lightning rapidly heats the air around it, causing the air to expand and produce the loud sound of thunder.
Answer: (b)
Both A and R are true, but R is NOT the correct explanation of A. While R correctly explains how thunder is produced, it does not explain why thunder is heard after lightning is seen (which is because light travels faster than sound).
14
Assertion (A): Cyclones form over warm ocean waters.
Reason (R): Earth's rotation causes the moving air to spin, creating the characteristic spinning motion of cyclones.
Reason (R): Earth's rotation causes the moving air to spin, creating the characteristic spinning motion of cyclones.
Answer: (b)
Both A and R are true, but R is NOT the correct explanation of A. While both are true, R explains the spinning motion of cyclones, not why they form over warm ocean waters (which is due to warm moist air rising and condensation releasing heat).
15
Assertion (A): The eye of a cyclone is the region with the strongest winds and heaviest rainfall.
Reason (R): The eye is the region of lowest pressure at the centre of the cyclone.
Reason (R): The eye is the region of lowest pressure at the centre of the cyclone.
Answer: (d)
A is false, but R is true. The eye of the cyclone is actually the calmest region with minimal wind and no rain. The surrounding region experiences strong winds and heavy rainfall.
❓ Frequently Asked Questions
What is covered in CBSE Class 8 Science Chapter 6 Pressure, Winds, Storms, and Cyclones?
This chapter covers all key topics from Pressure, Winds, Storms, and Cyclones as per CBSE 2026-27 syllabus.
Is this Assertion & Reason useful for CBSE board exams?
Yes, designed for CBSE Class 8 board exam preparation covering the complete syllabus.
Are these CBSE Class 8 Science Assertion & Reason updated for 2026-27?
Yes, all content at eBookPublisher is updated as per the latest 2026-27 CBSE syllabus.
How many chapters are in CBSE Class 8 Science?
All chapters of CBSE Class 8 Science are covered at eBookPublisher with free Assertion & Reason for each chapter.
Can I study Pressure, Winds, Storms, and Cyclones online for free?
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