CBSE Class 8 Science Chapter 06 Pressure, Winds, Storms, And Cyclones MCQs Set 01

Download CBSE MCQs for Class 8 Science: Chapter 06 Pressure, Winds, Storms, And Cyclones

Review structured MCQ sets for Class 8 Science Chapter 06 Pressure, Winds, Storms, And Cyclones. Built according to official CBSE guidelines, these downloadable questions support daily revision and core concept reinforcement.

Chapter-wise Objective Questions: Chapter 06 Pressure, Winds, Storms, And Cyclones

Access the complete set of multiple-choice questions for Chapter 06 Pressure, Winds, Storms, And Cyclones below. This focused format allows students to isolate specific topics for thorough review and uninterrupted practice alongside official CBSE textbooks.

Question: In the example of Megha and Pawan's bags, why does Pawan feel more discomfort than Megha despite carrying identical items?
A. Pawan's bag is heavier than Megha's bag
B. Pawan's bag has narrow straps that concentrate the force on a smaller area of his shoulders
C. Megha's bag has a different weight distribution inside
D. The bags are made of different materials
Show Answer & Explanation

Answer: (B) Pawan's bag has narrow straps that concentrate the force on a smaller area of his shoulders

Explanation:
Pawan's narrow straps concentrate the same weight over a much smaller area of his shoulders compared to Megha's broad straps, resulting in higher pressure and greater discomfort.

Question: When a force of 100 N is applied on a cardboard with an area of 2 m², what is the pressure exerted?
A. 50 N/m²
B. 100 N/m²
C. 200 N/m²
D. 0.5 N/m²
Show Answer & Explanation

Answer: (A) 50 N/m²

Explanation:
Pressure = Force ÷ Area = 100 N ÷ 2 m² = 50 N/m².

Question: Why do overhead water tanks placed at a height result in better water pressure at the taps?
A. The tank material conducts pressure more effectively
B. The height of the water column above the taps creates greater pressure
C. The pipes are wider near the tank
D. Gravity pulls water more strongly downward at that height
Show Answer & Explanation

Answer: (B) The height of the water column above the taps creates greater pressure

Explanation:
The pressure exerted by a liquid in a vessel depends on the height of its column; greater height produces greater pressure at the bottom, ensuring a good stream of water from taps.

Question: In Activity 6.2 with the plastic bottle and holes, water flows out from the holes because
A. the bottle is made of thin plastic
B. liquids exert pressure on the walls and bottom of containers
C. the holes are at the same height
D. gravity alone pulls water through the holes
Show Answer & Explanation

Answer: (B) liquids exert pressure on the walls and bottom of containers

Explanation:
The observation that water flows out sideways from holes at the same height shows that liquids exert pressure in all directions, not just downward.

Question: When air moves from one balloon to another through a straw in Activity 6.5, what is the underlying reason?
A. Air molecules are attracted to each other
B. The inflated balloon has higher pressure than the uninflated one, causing air to flow toward lower pressure
C. Both balloons have equal pressure from the start
D. The straw forces air to move between them
Show Answer & Explanation

Answer: (B) The inflated balloon has higher pressure than the uninflated one, causing air to flow toward lower pressure

Explanation:
Air naturally moves from a region of high pressure to one of low pressure; the flow stops only when pressure equalizes in both balloons.

Question: Why can high-speed winds blow off the roofs of houses?
A. The winds push down very hard on the roof
B. High-speed winds create a low-pressure area above the roof, while higher pressure inside pushes the roof upward
C. Roofs are structurally weak in general
D. Wind removes nails from the roof
Show Answer & Explanation

Answer: (B) High-speed winds create a low-pressure area above the roof, while higher pressure inside pushes the roof upward

Explanation:
High-speed winds are accompanied by reduced air pressure above the roof; if pressure inside exceeds pressure above, and the pressure difference is large, weak roofs can be blown away.

Question: What is the primary reason the atmosphere does not crush us despite its enormous weight?
A. We are not exposed to the full atmosphere
B. The pressure inside our bodies is also equal to atmospheric pressure, creating a balance
C. Human skin is strong enough to withstand the pressure
D. Atmospheric pressure only acts downward
Show Answer & Explanation

Answer: (B) The pressure inside our bodies is also equal to atmospheric pressure, creating a balance

Explanation:
The pressure inside our bodies, caused by movement of fluids and gases in tissues and organs, equals atmospheric pressure from outside, so these pressures balance and we are not crushed.

Question: According to the chapter, which of the following is NOT mentioned as a reason why land breeze occurs at night?
A. The water is warmer than the land at night
B. A low-pressure area develops above the sea
C. Wind blows from land toward the sea
D. The land loses heat faster than the sea
Show Answer & Explanation

Answer: (D) The land loses heat faster than the sea

Explanation:
While the land does cool at night, the chapter specifically states that a low-pressure area develops above the warmer sea, causing wind to blow from the land to the sea, creating a land breeze.

Question: During the formation of a thunderstorm, how do electric charges develop in clouds?
A. Lightning creates the charges
B. Strong winds blowing upward and downward cause water droplets and ice particles to rub against each other, generating static electric charges
C. Clouds absorb electricity from the ground
D. Heat from the sun ionizes air molecules
Show Answer & Explanation

Answer: (B) Strong winds blowing upward and downward cause water droplets and ice particles to rub against each other, generating static electric charges

Explanation:
The rubbing of water droplets and ice particles due to strong vertical winds facilitates charge separation, similar to how rubbing two objects creates static electricity.

Question: Which statement correctly describes the locations of positive and negative charges in a charged cloud?
A. Positive charges are scattered randomly throughout the cloud
B. Negatively charged heavier water droplets occupy the upper part and positively charged ice particles the lower part
C. Positively charged lighter ice particles move upward and occupy the upper part; negatively charged heavier water droplets occupy the lower part
D. All charges remain at the cloud base
Show Answer & Explanation

Answer: (C) Positively charged lighter ice particles move upward and occupy the upper part; negatively charged heavier water droplets occupy the lower part

Explanation:
During charge separation in thunderstorms, the lighter positively charged ice particles rise to the top while heavier negatively charged droplets sink to the bottom of the cloud.

Question: What distinguishes the eye of a cyclone from the surrounding regions?
A. The eye is the strongest part of the cyclone with the highest wind speeds
B. The eye is calm with low wind speeds, while surrounding regions experience strong winds and heavy rainfall
C. The eye has the highest rainfall
D. The eye is where lightning occurs most frequently
Show Answer & Explanation

Answer: (B) The eye is calm with low wind speeds, while surrounding regions experience strong winds and heavy rainfall

Explanation:
The eye of the cyclone is a region of lowest pressure at the center where wind is calm, but immediately surrounding it are areas of intense winds and rainfall.

Question: Why do cyclones gradually lose their strength once they reach land?
A. The land surface is too rough for the cyclone to maintain energy
B. The source of moist air over warm ocean water is cut off, removing the energy that sustains the system
C. Cyclones cannot move over solid ground
D. Friction with mountains weakens the system
Show Answer & Explanation

Answer: (B) The source of moist air over warm ocean water is cut off, removing the energy that sustains the system

Explanation:
Cyclones form and intensify over warm ocean waters where evaporation provides latent heat energy; without this continuous moisture source over land, they weaken rapidly.

Question: If the Earth stopped rotating, which consequence would most likely occur regarding cyclones?
A. Cyclones would become stronger
B. Cyclones would still form in the same way
C. Cyclones would not form because Earth's rotation causes moving air to spin
D. Cyclones would form only at the equator
Show Answer & Explanation

Answer: (C) Cyclones would not form because Earth's rotation causes moving air to spin

Explanation:
The chapter states that Earth's rotation causes moving air to spin, which is essential for cyclone formation; without this spinning mechanism, the characteristic cyclone structure would not develop.

Question: In the context of pressure in liquids, why are dam bases made much broader than their tops?
A. Broader bases look more aesthetically pleasing
B. The base must support the weight of the dam structure and withstand large horizontal water pressure near the bottom
C. Broader bases prevent earthquakes
D. Water pressure is greatest at the top of dams
Show Answer & Explanation

Answer: (B) The base must support the weight of the dam structure and withstand large horizontal water pressure near the bottom

Explanation:
The chapter explains that water stored in a dam exerts both horizontal pressure on side walls and vertical pressure on the floor; pressure increases with depth, making the base experience the greatest horizontal force and requiring a broad, strong foundation.

Question: When Megha and Pawan carry water-filled buckets in the story, a bucket with a broad handle feels easier to lift than one with a narrow handle. This is primarily because the broad handle
A. reduces the total weight of the bucket
B. distributes the force over a larger area, decreasing pressure on the hand
C. allows for a better grip without slipping
D. increases the atmospheric pressure on the bucket
Show Answer & Explanation

Answer: (B) distributes the force over a larger area, decreasing pressure on the hand

Explanation:
A broad handle spreads the force of the bucket's weight across a larger area of contact with the hand, resulting in lower pressure. Since pressure equals force divided by area, increasing the contact area while keeping the force constant reduces the pressure exerted on the hand, making it more comfortable to carry.

Question: In Activity 6.1 with the two transparent pipes of different diameters filled with water to the same height, why do both attached balloons bulge to an equal extent despite the pipes holding different volumes of water?
A. The weight of water determines the bulge equally regardless of volume
B. The pressure exerted by water depends on the height of the column, not the total volume
C. The balloons adjust their elasticity based on the pipe diameter
D. The wider pipe compensates for volume differences through lateral pressure
Show Answer & Explanation

Answer: (B) The pressure exerted by water depends on the height of the column, not the total volume

Explanation:
The bulge depends on pressure, which for a liquid column at a given depth is determined by height alone, not by how much total water is present. Two columns of equal height create equal pressure at their base, so both balloons experience the same outward force and bulge identically.

Question: In Activity 6.3, when attempting to lift an inverted paper plate covered with an unfolded chart paper versus a folded chart paper, more effort is required with the unfolded sheet. What does this observation demonstrate?
A. Heavier paper requires more force to lift
B. Air exerts a force that increases with the area of contact
C. Atmospheric pressure acts only on smooth surfaces
D. Larger sheets naturally provide better mechanical advantage
Show Answer & Explanation

Answer: (B) Air exerts a force that increases with the area of contact

Explanation:
• Weight of the paper remains unchanged in both cases
• Only the covering area differs between folded and unfolded sheets
• Larger covering area means more atmospheric pressure acts on the plate
• This greater force makes lifting more difficult with the unfolded sheet

Question: When an inflated balloon connected via a straw to a deflated balloon eventually reaches equilibrium, what causes the air flow to stop?
A. The deflated balloon becomes rigid and cannot expand further
B. Air pressure becomes equal in both balloons
C. The straw develops a blockage from air friction
D. The inflated balloon runs out of air to transfer
Show Answer & Explanation

Answer: (B) Air pressure becomes equal in both balloons

Explanation:
Air naturally flows from high-pressure to low-pressure regions. Once pressure equalizes between the two balloons, there is no longer a pressure difference driving the flow, so air movement ceases and both balloons stabilize at nearly the same size.

Question: During the formation of a thunderstorm, water droplets and ice particles rub against each other due to strong vertical winds. How does this physical contact lead to the separation of electric charges within the cloud?
A. Friction between objects causes them to gain or lose electrons, creating opposite charges
B. The heat from friction melts some ice particles, releasing stored electrical energy
C. Water droplets absorb atmospheric electricity during condensation
D. The cold temperature at high altitudes spontaneously generates electrical charges
Show Answer & Explanation

Answer: (A) Friction between objects causes them to gain or lose electrons, creating opposite charges

Explanation:
The chapter explains that when two objects are rubbed against each other, static electric charges develop. In thunderstorms, the upward and downward wind-driven motion causes water droplets and ice particles to collide and rub, transferring electrons and creating positively and negatively charged particles.

Question: In a charged thundercloud, the positively charged ice particles occupy the upper portion while negatively charged water droplets settle in the lower portion. When the negatively charged base approaches the ground, what effect does this have on objects on Earth's surface?
A. Objects become negatively charged by induction
B. Objects are attracted upward toward the cloud
C. Objects become positively charged by induction
D. Objects experience no electrical change until lightning strikes
Show Answer & Explanation

Answer: (C) Objects become positively charged by induction

Explanation:
When a negatively charged cloud region moves closer to the ground, it repels electrons in objects on Earth's surface, causing those objects to become positively charged by induction. This charge separation between cloud and ground creates the potential for a lightning discharge.

Question: Regarding the "eye" of a cyclone, which of the following statements is accurate?
A. It is the region of highest wind speed and heaviest rainfall
B. It is a calm zone at the center with the lowest pressure but surrounded by strong winds
C. It moves faster than the outer edges of the cyclone system
D. It contains the same wind speed as the surrounding regions
Show Answer & Explanation

Answer: (B) It is a calm zone at the center with the lowest pressure but surrounded by strong winds

Explanation:
The eye of a cyclone is a distinct feature—a region of calm wind at the very center where pressure is at its minimum. In sharp contrast, the areas immediately surrounding the eye experience extreme winds and intense rainfall, making the eye a temporary zone of relative calm.

Question: Once a cyclone moves from the ocean over land, its strength gradually diminishes. Which of the following best explains why?
A. Land friction slows down the rotation of the storm system
B. The warm ocean water that provided heat energy is no longer available
C. The Earth's rotation slows down over land, weakening the cyclone
D. Atmospheric pressure increases inland, pushing the cyclone upward
Show Answer & Explanation

Answer: (B) The warm ocean water that provided heat energy is no longer available

Explanation:
Cyclones are powered by heat released when water vapour condenses. Over warm ocean water, continuous evaporation and condensation fuel the system. Once the cyclone moves inland, the source of warm, moist air is cut off, so there is no longer enough energy to sustain the storm's intensity.

Question: Why are holes deliberately made in large outdoor banners and hoardings, rather than using solid surfaces?
A. To allow advertisement text to be more visible through the holes
B. To reduce the surface area that high-speed winds can push against
C. To improve the aesthetic appearance of the structure
D. To allow rainwater to drain through the surface
Show Answer & Explanation

Answer: (B) To reduce the surface area that high-speed winds can push against

Explanation:
When high-speed winds encounter a solid surface, they create a large force. By introducing holes throughout the banner, the wind passes through rather than pushing against a continuous area. This reduces the pressure difference across the surface and decreases the likelihood of the banner being torn or blown away.

Question: On a summer afternoon at a coastal location, trees are bent noticeably in one direction. If you observe that trees are leaning toward the land (away from the sea), which interpretation about the location of land and water is most accurate?
A. The side toward which trees lean is the land side, indicating sea breeze
B. The side away from tree-lean is the land side, indicating land breeze
C. The trees are leaning toward the sea because sea breeze is stronger
D. Tree lean direction is unrelated to land or sea breeze patterns
Show Answer & Explanation

Answer: (A) The side toward which trees lean is the land side, indicating sea breeze

Explanation:
During daytime, land heats faster than the ocean, causing warm air to rise over land and creating low pressure. Cooler air over the sea rushes toward land to fill this low-pressure area, creating a sea breeze that blows from sea to land. If trees bend toward the land, the wind is pushing them in that direction, confirming that direction is where the sea breeze originates from.

Question: The Amphan cyclone of 2020 created a wall of ocean water 3–12 metres high that flooded coastal and inland areas. Beyond the immediate water flooding, what is a significant secondary damage to farmland from such seawater inundation?
A. Salt in seawater corrodes farming equipment and tools
B. Salt deposits in soil reduce soil fertility and crop productivity
C. Seawater freezes in cold seasons, damaging soil structure
D. The weight of water compresses soil permanently
Show Answer & Explanation

Answer: (B) Salt deposits in soil reduce soil fertility and crop productivity

Explanation:
The chapter specifically states that salt in seawater makes soil less fertile when it contaminates agricultural land. This reduces the soil's ability to support crop growth, causing long-term damage to farming productivity in affected regions even after floodwaters recede.

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Multiple Choice Questions (MCQs) for Class 8 Science Chapter 06 Pressure, Winds, Storms, And Cyclones

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