This chapter is based on Pressure, Winds, Storms, and Cyclones. In this chapter following topics are covered – pressure, pressure in liquids and air, atmospheric pressure, formation of wind, high-speed winds and low pressure, storms, thunderstorms, lightning, cyclone formation, eye of a cyclone, and safety measures.
The match-the-following questions or MCQ in this set are based on Chapter 6 of the Class 8 NCERT Science book. The questions below are designed to help you revise important topics. Test your knowledge, spot patterns, and have fun learning! It’s like a quiz game but with science facts!
MCQ for other chapters Class 8 Science MCQ Questions and Answers.
Class 8 Science Chapter 6 MCQ Online Test Questions and Answers
Question 1. Pressure is defined as:
a) Force × area
b) Force per unit area
c) Area per unit force
d) Mass per unit area
Answer:
b) Force per unit area
Question 2. While calculating pressure in this chapter, we consider only those forces which act:
a) Parallel to the surface
b) Along any random direction
c) Perpendicular to the surface
d) Opposite to gravity
Answer:
c) Perpendicular to the surface
Question 3. Two bags have the same weight, but one has broad straps and the other has narrow straps. The bag with broad straps feels more comfortable because it:
a) Has less mass
b) Exerts less pressure on the shoulders
c) Exerts more force on the shoulders
d) Has less gravitational pull
Answer:
b) Exerts less pressure on the shoulders
Question 4. A water-filled bucket is easier to lift with a broad handle than with a narrow handle because the broad handle:
a) Reduces the weight of the bucket
b) Increases the pressure on the hand
c) Spreads the force over a larger area
d) Changes the direction of gravity
Answer:
c) Spreads the force over a larger area
Question 5. The SI unit of pressure is:
a) Newton
b) Joule
c) Newton per metre square
d) Kilogram per metre
Answer:
c) Newton per metre square
Question 6. The SI unit newton per metre square is also called:
a) Bar
b) Pascal
c) Millibar
d) Dyne
Answer:
b) Pascal
Question 7. It is easier to drive a nail into a wooden block using its pointed end because the pointed end:
a) Has greater mass
b) Has smaller area and produces higher pressure
c) Has larger area and produces higher pressure
d) Reduces the force applied
Answer:
b) Has smaller area and produces higher pressure
Question 8. It is easier to cut an apple with the sharp edge of a knife than with the blunt edge because the sharp edge:
a) Has more area
b) Produces less force
c) Produces more pressure for the same force
d) Has less weight
Answer:
c) Produces more pressure for the same force
Question 9. In the activity with two pipes of different diameters but equal water heights, the balloons bulge equally because liquid pressure depends mainly on the:
a) Width of the pipe
b) Weight of water only
c) Height of the water column
d) Colour of the pipe
Answer:
c) Height of the water column
Question 10. If the height of the water column in a pipe is increased, the pressure at the bottom of the pipe:
a) Decreases
b) Remains unchanged
c) Increases
d) Becomes zero
Answer:
c) Increases
Question 11. Overhead water tanks are placed at a height mainly so that:
a) The tank looks bigger
b) Water remains cooler
c) Water pressure at the taps increases
d) The tank becomes lighter
Answer:
c) Water pressure at the taps increases
Question 12. If two people live on the first and second floors of a building, and the overhead tank is above both, the person on the first floor usually gets a more powerful stream of water because:
a) The water is cleaner there
b) The height of the water column above the tap is greater
c) The tank is closer to the roof
d) Gravity is weaker on upper floors
Answer:
b) The height of the water column above the tap is greater
Question 13. Water flowing out through holes on the sides of a bottle shows that liquids exert pressure:
a) Only at the bottom
b) Only upwards
c) On the sides also
d) Only in narrow containers
Answer:
c) On the sides also
Question 14. Liquids exert pressure:
a) Only downward
b) Only upward
c) In all directions
d) Only on the walls of the container
Answer:
c) In all directions
Question 15. The base of a dam is made broader than the top mainly because:
a) It looks better
b) Water pressure is greater near the bottom
c) Water pressure is greater near the top
d) Air pressure is absent near the bottom
Answer:
b) Water pressure is greater near the bottom
Question 16. The envelope of air surrounding the Earth is called the:
a) Hydrosphere
b) Lithosphere
c) Atmosphere
d) Biosphere
Answer:
c) Atmosphere
Question 17. The pressure exerted by the air around us is known as:
a) Water pressure
b) Gravitational pressure
c) Atmospheric pressure
d) Internal pressure
Answer:
c) Atmospheric pressure
Question 18. When a balloon is inflated, it expands in all directions because the air inside it exerts pressure:
a) Only downwards
b) Only upwards
c) In all directions
d) Only at the mouth of the balloon
Answer:
c) In all directions
Question 19. A rubber sucker sticks firmly to a smooth flat surface because:
a) There is more air pressure inside the sucker than outside
b) There is less air pressure outside than inside
c) The air pressure outside is greater than the air pressure inside
d) The surface attracts rubber magnetically
Answer:
c) The air pressure outside is greater than the air pressure inside
Question 20. We are not crushed by atmospheric pressure because:
a) Our bodies have no air inside
b) The pressure inside our bodies balances the atmospheric pressure outside
c) Atmospheric pressure acts only at night
d) Gravity cancels atmospheric pressure completely
Answer:
b) The pressure inside our bodies balances the atmospheric pressure outside
Question 21. Air moves from a region of:
a) Low pressure to high pressure
b) High pressure to low pressure
c) Equal pressure to lower pressure only at night
d) Low pressure to equal pressure
Answer:
b) High pressure to low pressure
Question 22. During the daytime, sea breeze blows from sea to land because:
a) Land remains cooler than sea
b) Air pressure over land becomes lower than over sea
c) Air pressure over sea becomes lower than over land
d) Sea water pulls air towards it
Answer:
b) Air pressure over land becomes lower than over sea
Question 23. During the night, land breeze blows from land to sea because:
a) Air pressure over sea becomes lower than over land
b) Air pressure over land becomes lower than over sea
c) The sea stops heating the air
d) The wind direction reverses randomly
Answer:
a) Air pressure over sea becomes lower than over land
Question 24. When air is blown between two hanging balloons, the balloons move towards each other because:
a) The air between them becomes hotter
b) High-speed air creates a low-pressure region between them
c) The balloons become positively charged
d) Gravity increases between them
Answer:
b) High-speed air creates a low-pressure region between them
Question 25. High-speed winds are accompanied by:
a) Increased air pressure
b) Reduced air pressure
c) No change in air pressure
d) Equal pressure in all cases
Answer:
b) Reduced air pressure
Question 26. It is safer to keep doors and windows open during storms with very high-speed winds because this helps to:
a) Increase indoor pressure greatly
b) Reduce the pressure difference across the roof
c) Stop all air movement inside the house
d) Make the roof heavier
Answer:
b) Reduce the pressure difference across the roof
Question 27. A storm accompanied by thunder and lightning is called a:
a) Dust storm
b) Cyclone
c) Thunderstorm
d) Tornado
Answer:
c) Thunderstorm
Question 28. Lightning occurs when:
a) Warm air and cool air mix gently
b) The insulating property of air breaks down due to a large build-up of charges
c) The clouds become too heavy with water
d) Winds stop moving completely
Answer:
b) The insulating property of air breaks down due to a large build-up of charges
Question 29. Thunder is heard because lightning:
a) Produces sound directly inside clouds only
b) Rapidly heats the surrounding air, causing it to expand
c) Cools the surrounding air suddenly
d) Shakes the ground first
Answer:
b) Rapidly heats the surrounding air, causing it to expand
Question 30. During lightning, which of the following is the safest action?
a) Standing under a tall tree
b) Lying flat on open ground
c) Crouching down in a low-lying open area
d) Holding an umbrella with a metallic rod
Answer:
c) Crouching down in a low-lying open area
Question 31. A lightning conductor protects a building by:
a) Stopping cloud formation
b) Attracting rain away from the building
c) Providing an easy path for electric charges to flow into the ground
d) Preventing all storms from reaching the area
Answer:
c) Providing an easy path for electric charges to flow into the ground
Question 32. Cyclones form over warm ocean waters because warm and moist air above the ocean:
a) Becomes heavier and sinks
b) Rises and creates a low-pressure area
c) Stops evaporation completely
d) Prevents surrounding air from moving
Answer:
b) Rises and creates a low-pressure area
Question 33. The region of lowest pressure in a cyclone is called the:
a) Core wall
b) Centre belt
c) Eye of the cyclone
d) Ring of clouds
Answer:
c) Eye of the cyclone
Question 34. At the eye of a cyclone, the weather is generally:
a) Stormy with very strong winds
b) Calm
c) Very hot and dry
d) Full of lightning only
Answer:
b) Calm
Question 35. A cyclone weakens after reaching land mainly because:
a) Earth stops rotating
b) Its source of moist air gets cut off
c) Air pressure becomes zero
d) Sea water enters the clouds
Answer:
b) Its source of moist air gets cut off
Question 36 – Match the Following
| Column A | Column B |
|---|---|
| 1. Broad bag straps | A. Pressure exerted by air around us |
| 2. Pascal | B. Reduce pressure by increasing area |
| 3. Atmospheric pressure | C. SI unit of pressure |
| 4. Overhead water tank | D. Increases pressure in taps |
| 5. Pointed nail | E. Produces high pressure on a small area |
Answer:
| Column A | Correct Answer |
|---|---|
| 1. Broad bag straps | B. Reduce pressure by increasing area |
| 2. Pascal | C. SI unit of pressure |
| 3. Atmospheric pressure | A. Pressure exerted by air around us |
| 4. Overhead water tank | D. Increases pressure in taps |
| 5. Pointed nail | E. Produces high pressure on a small area |
Question 37 – Match the Following
| Column A | Column B |
|---|---|
| 1. Sea breeze | A. Calm centre of a cyclone |
| 2. High-speed winds | B. Wind blows from sea to land during day |
| 3. Lightning conductor | C. Associated with reduced air pressure |
| 4. Eye of cyclone | D. Provides easy path for charges to reach ground |
| 5. Thunderstorm | E. Storm accompanied by lightning and thunder |
Answer:
| Column A | Correct Answer |
|---|---|
| 1. Sea breeze | B. Wind blows from sea to land during day |
| 2. High-speed winds | C. Associated with reduced air pressure |
| 3. Lightning conductor | D. Provides easy path for charges to reach ground |
| 4. Eye of cyclone | A. Calm centre of a cyclone |
| 5. Thunderstorm | E. Storm accompanied by lightning and thunder |
