Air Pressure and Cyclone Safety MCQs
Air Pressure and Cyclone Safety – MCQs
Class: 7 | Subject: Science
Section: Air & Natural Disasters
Topic: Air Pressure and Cyclone Safety
Based on: CBSE Board Examination Pattern
Section: Air & Natural Disasters
Topic: Air Pressure and Cyclone Safety
Based on: CBSE Board Examination Pattern
Instructions: These Multiple Choice Questions (MCQs) are designed strictly as per the NCERT syllabus, making them ideal for CBSE Class 7 Science examinations. Each question includes detailed explanations for strong concept clarity.
1. Air pressure is caused due to:
Answer: B. Weight of air
Air has mass and is pulled by gravity. The weight of the air column above us exerts pressure on the Earth’s surface, called atmospheric pressure.
Air has mass and is pulled by gravity. The weight of the air column above us exerts pressure on the Earth’s surface, called atmospheric pressure.
2. Air moves from:
Answer: B. High to low pressure
Wind is created when air flows from regions of high pressure to regions of low pressure to balance the pressure difference.
Wind is created when air flows from regions of high pressure to regions of low pressure to balance the pressure difference.
3. Low pressure is created when air:
Answer: B. Heats and rises
Warm air expands, becomes lighter, and rises. This creates a low‑pressure area near the surface.
Warm air expands, becomes lighter, and rises. This creates a low‑pressure area near the surface.
4. Cyclones form over warm oceans because of:
Answer: B. Moisture and heat
Warm ocean water provides heat energy and moisture, which fuel cyclone formation.
Warm ocean water provides heat energy and moisture, which fuel cyclone formation.
5. The calm center of a cyclone is called:
Answer: B. Eye
The eye has very low pressure and relatively calm winds compared to the surrounding storm.
The eye has very low pressure and relatively calm winds compared to the surrounding storm.
6. The instrument used to measure air pressure is:
Answer: B. Barometer
Barometers help meteorologists predict weather changes and cyclone formation.
Barometers help meteorologists predict weather changes and cyclone formation.
7. During a cyclone warning, fishermen should:
Answer: C. Return to shore
Cyclones create dangerous sea conditions. Safety advisories require fishermen to stay ashore.
Cyclones create dangerous sea conditions. Safety advisories require fishermen to stay ashore.
8. Safe shelter during a cyclone is:
Answer: C. Cyclone shelters
Specially designed cyclone shelters can withstand strong winds and flooding.
Specially designed cyclone shelters can withstand strong winds and flooding.
9. Storm surge means:
Answer: B. Sea water rise
Strong cyclone winds push seawater toward land causing coastal flooding.
Strong cyclone winds push seawater toward land causing coastal flooding.
10. Windows should be:
Answer: C. Tightly closed
Closing windows prevents wind pressure damage and flying debris entry.
Closing windows prevents wind pressure damage and flying debris entry.
11. Air pressure decreases with:
Answer: A. Altitude
As height increases, the air column above decreases, lowering pressure.
As height increases, the air column above decreases, lowering pressure.
12. Fast spinning winds in a small area form:
Answer: B. Tornado
Tornadoes are violent rotating wind columns over land.
Tornadoes are violent rotating wind columns over land.
13. Cyclone alerts are issued by:
Answer: B
Weather agencies monitor satellite and radar data to warn people.
Weather agencies monitor satellite and radar data to warn people.
14. Emergency kits should include:
Answer: D
Emergency kits ensure survival during power cuts and floods.
Emergency kits ensure survival during power cuts and floods.
15. Loose objects should be:
Answer: B
Strong winds can turn loose items into dangerous projectiles.
Strong winds can turn loose items into dangerous projectiles.
16. Mobile phones should be:
Answer: B
Charged phones help receive alerts and contact rescue services.
Charged phones help receive alerts and contact rescue services.
17. Cyclones bring:
Answer: B
High‑speed winds, rain, and flooding cause destruction.
High‑speed winds, rain, and flooding cause destruction.
18. Evacuation means:
Answer: B
People are moved to safer places before disasters strike.
People are moved to safer places before disasters strike.
19. The main cause of wind movement is:
Answer: A
Pressure differences created by uneven heating move air.
Pressure differences created by uneven heating move air.
20. The best way to stay safe is to:
Answer: B
Following official safety advisories minimizes risk and saves lives.
Following official safety advisories minimizes risk and saves lives.