People, Development and Environment - People, Development and Environment Section 2
21. When the moon is near the horizon, then it appears bigger because of
- Option : A
- Explanation :
When the moon is near the horizon, the atmosphere bends light due to refraction, which makes the moon appear larger than when it's overhead.
A. Atmospheric refraction – Correct. Bending of light causes apparent enlargement.
B. Scattering of light – Incorrect. Responsible for color effects, not size.
C. Diffraction – Incorrect. Involves bending of light around objects, not relevant here.
D. Total internal reflection – Incorrect. Occurs in optics and water, not in this case.
22. Tsunamis are huge sea waves caused by:
- Option : A
- Explanation :
Tsunamis are triggered mostly by underwater earthquakes that displace large volumes of water.
A. Earthquakes – Correct. Most common cause of tsunamis.
B. Volcanoes – Incorrect. Can cause tsunamis but less frequently.
C. Winds – Incorrect. Winds cause regular waves, not tsunamis.
D. Icebergs – Incorrect. Icebergs can break off, but not typically tsunami-generating.
- Option : B
- Explanation :
An equinox occurs when the sun is directly above the equator, leading to nearly equal day and night durations worldwide.
A. Days are longer than nights – Incorrect. Happens during summer solstice.
B. Days and nights are equal – Correct. This is the definition of equinox.
C. Days are shorter than nights – Incorrect. Happens during winter solstice.
D. None of these – Incorrect. Option B is the accurate definition.
24. International Date Line passes through
- Option : B
- Explanation :
The International Date Line roughly follows the 180° meridian in the Pacific Ocean but deviates around islands.
A. 0° Greenwich – Incorrect. This is the Prime Meridian.
B. 180° Greenwich – Correct. The IDL generally follows this longitude.
C. 900 Greenwich – Incorrect. 90° is a latitude, not relevant here.
D. 2700 Greenwich – Incorrect. 270° does not exist on the longitude scale in this way.
25. Suez navigation canal links up Mediterranean Sea with the
- Option : D
- Explanation :
The Suez Canal is a man-made waterway in Egypt connecting the Mediterranean Sea with the Red Sea, providing a shortcut between Europe and Asia.
A. Atlantic Ocean – Incorrect. It is not directly connected by the Suez Canal.
B. Pacific Ocean – Incorrect. The canal does not reach the Pacific.
C. North Sea – Incorrect. Located in northern Europe, unrelated to Suez.
D. Red Sea – Correct. This is the southern end of the Suez Canal.
