SSC CGL Geography – Atmosphere – Structure, Pressure Belts & Winds – Level 1 · Warm-up · Tier I Level

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SSC CGL Geography – Atmosphere – Structure, Pressure Belts & Winds – Level 1 · Warm-up · Tier I Level – 12 questions, subject: Geography – India & World. Every question has the correct answer with a one-line explanation; tap "Show Answer". Free practice for TNPSC, UPSC, SSC, Bank and RRB exams – Shanmugam IAS Academy, Coimbatore.

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1.  
The most abundant gas in the atmosphere is:

Correct Answer: A [Nitrogen]

Explanation:

Nitrogen ≈ 78%, oxygen ≈ 21%.

2.  
The ozone layer lies in the:

Correct Answer: D [Stratosphere]

Explanation:

Ozone absorbs UV and warms the stratosphere.

3.  
Meteors entering from space mostly burn up in the:

Correct Answer: B [Mesosphere]

Explanation:

The mesosphere (≈ 50–80 km).

4.  
Radio waves sent from the Earth are reflected back by the:

Correct Answer: C [Ionosphere]

Explanation:

Charged particles (ions) above ≈ 80 km reflect radio waves.

5.  
Atmospheric pressure is measured with a:

Correct Answer: D [Barometer]

Explanation:

Anemometer – wind speed; hygrometer – humidity.

6.  
The calm belt of low pressure near the equator is called the:

Correct Answer: C [Doldrums]

Explanation:

Horse latitudes are the calm subtropical highs near 30°.

7.  
The 'Roaring Forties' are strong westerly winds found near:

Correct Answer: B [40° S]

Explanation:

Southern westerlies blow over open ocean: Roaring Forties, Furious Fifties, Shrieking Sixties.

8.  
In the Northern Hemisphere, the Coriolis force turns moving air to the:

Correct Answer: A [right]

Explanation:

Right in the north, left in the south (Ferrel's law).

9.  
Fill in the blankTrade winds blow from the subtropical highs towards the ____.

Correct Answer: A [equatorial low]

Explanation:

They converge at the ITCZ.

10.  
The 'Loo' is a hot, dry summer wind of:

Correct Answer: B [the northern plains of India]

Explanation:

Blows from Punjab to Bihar in May–June.

11.  
A sea breeze blows during the:

Correct Answer: D [day]

Explanation:

By day the land is hotter, so air flows from the sea to the land.

12.  
One-line recallthe direction of the wind is shown by a:

Correct Answer: C [wind vane]

Explanation:

Wind vane – direction; anemometer – speed.

➤ Full notes, shortcuts and every answer explained – SSC CGL 2026 Geography – India & World book (₹149): www.shanmugamiasacademy.in/study-materials/ssc-cgl-geography-india-world

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