Test Your Knowledge: Class 8 Pressure, Winds, Storms, and Cyclones MCQs with Solutions
Part A: Multiple Choice Questions:
- Pressure is defined as the force acting per unit:
a) Volume
b) Area
c) Height
d) Weight
Answer: b) Area - The SI unit of pressure is:
a) Joule
b) Newton
c) Pascal
d) Watt
Answer: c) Pascal - Why does a knife cut better when it is sharp?
a) It reduces force
b) It increases pressure
c) It increases area
d) It decreases pressure
Answer: b) It increases pressure - Water tanks are placed at height mainly to:
a) Save space
b) Increase air pressure
c) Increase water pressure
d) Store more water
Answer: c) Increase water pressure - Which statement about liquid pressure is true?
a) It acts only at the bottom
b) It acts in all directions
c) It depends only on density
d) It is independent of height
Answer: b) It acts in all directions - Atmospheric pressure acts:
a) Only downward
b) Only upward
c) In all directions
d) Horizontally only
Answer: c) In all directions - What prevents us from being crushed by atmospheric pressure?
a) Our body is very strong
b) Pressure inside our body equals external pressure
c) Earth’s magnetic field
d) Gravitational balance
Answer: b) Pressure inside our body equals external pressure - Air always moves from:
a) Cold to warm region
b) Low pressure to high pressure region
c) High pressure to low pressure region
d) West to east
Answer: c) High pressure to low pressure region - During the day, a sea breeze blows because:
a) Sea is cooler than land
b) Land is cooler than sea
c) Air pressure is higher on land
d) Sun heats the sea faster
Answer: a) Sea is cooler than land - The practical unit of atmospheric pressure is:
a) Pascal
b) Bar
c) Millibar (mb)
d) Newton
Answer: c) Millibar (mb)
More:
11. When high-speed winds blow, air pressure:
a) Increases
b) Decreases
c) Remains same
d) Becomes zero
Answer: b) Decreases
12. In a cyclone, the pressure is:
a) Maximum at centre
b) Minimum at centre
c) Uniform everywhere
d) None of these
Answer: b) Minimum at centre
13. Lightning is caused by:
a) Heat energy
b) Static electric charges
c) Magnetic field
d) Chemical reaction
Answer: b) Static electric charges
14. The sound produced during lightning is called:
a) Roar
b) Thunder
c) Storm
d) Cyclone
Answer: b) Thunder
15. The eye of a cyclone is:
a) Very calm
b) Very stormy
c) Full of clouds
d) Extremely hot
Answer: a) Very calm
16. Lightning conductors protect buildings by:
a) Storing charges
b) Blocking lightning
c) Providing path to ground
d) Reflecting electricity
Answer: c) Providing path to ground
17. The IMD monitors:
a) Volcanoes
b) Thunderstorms and cyclones
c) Forest fires
d) Air pollution only
Answer: b) Thunderstorms and cyclones
18. The broad base of a dam helps to:
a) Store more water
b) Reduce leakage
c) Withstand greater pressure at bottom
d) Allow easy flow
Answer: c) Withstand greater pressure at bottom
19. Which statement best explains a cyclone?
a) Rotating high-pressure system
b) Rotating low-pressure system
c) Air moving upwards
d) Cold air circulation
Answer: b) Rotating low-pressure system
20. Which of the following occurs due to high-speed winds over roofs?
a) Pressure above roof increases
b) Pressure above roof decreases
c) Roof temperature increases
d) None
Answer: b) Pressure above roof decreases
Part B: Fill in the Blanks:
- Pressure = ________ / Area
Answer: Force - The SI unit of pressure is ________.
Answer: Pascal (Pa) - Liquids exert pressure in ________ directions.
Answer: All - Air exerts pressure on ________ objects.
Answer: All - The atmospheric pressure at sea level is approximately ________ millibars.
Answer: 1013 - Air moves from a ________ pressure region to a ________ pressure region.
Answer: High, Low - Warm air rises creating a ________ pressure area.
Answer: Low - The calm region at the centre of a cyclone is called the ________.
Answer: Eye - The sound produced during lightning is called ________.
Answer: Thunder - A metallic rod installed to protect buildings from lightning is called a ________.
Answer: Lightning conductor
Part C: True or False:
- Pressure depends only on force, not on area. — False
- Liquids exert pressure only at the bottom of a container. — False
- Air pressure decreases with altitude. — True
- Air exerts pressure in all directions. — True
- Cyclones form over cold ocean waters. — False
- Warm air is lighter than cool air. — True
- The IMD helps predict cyclones and issues warnings. — True
- The eye of a cyclone is the region of strongest winds. — False
- During thunderstorms, it is safer to stay near tall trees. — False
- Lightning can occur between clouds or between cloud and ground. — True
Part D: Match the Following :
Column A | Column B |
1. Pascal | a) Unit of pressure |
2. Cyclone | b) Low-pressure rotating system |
3. Lightning conductor | c) Protects buildings from lightning |
Answers:
1 → a, 2 → b, 3 → c
Part E: Assertion–Reason:
- Assertion (A): High-speed winds are accompanied by a decrease in air pressure.
Reason (R): Increasing wind speed increases the air pressure on surfaces.
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
c) A is true, but R is false
d) A is false, but R is true
Answer: c) A is true, but R is false - Assertion (A): Water tanks are placed at higher positions to ensure better water flow in taps.
Reason (R): Water pressure increases with height of the water column.
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
c) A is true, but R is false
d) Both A and R are false
Answer: a) Both A and R are true, and R is the correct explanation of A
To Learn more Click Below:
MCQs:
Chapter 1- Exploring the Investigative World of Science – CLICK HERE
Chapter 2- The Invisible Living World: Beyond Our Naked Eye – CLICK HERE
Chapter 3- Health: The Ultimate Treasure – CLICK HERE
Chapter 4-Electricity: Magnetic and Heating Effects – CLICK HERE
Chapter 5- Exploring Forces – CLICK HERE