People, Development and Environment - People, Development and Environment Section 1
31. Which of the following is cold stream?
- Option : B
- Explanation :
Labrador Current is a cold oceanic current that flows southward along the coast of Labrador and Newfoundland in the North Atlantic Ocean. It significantly cools the eastern coast of Canada and contributes to the formation of fog when it meets the warm Gulf Stream.
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Option A: Curasia – Incorrect. There is no well-known current named Curasia.
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Option B: Labrador – Correct. The Labrador Current is a cold current in the North Atlantic Ocean.
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Option C: Gulf of Stream – Incorrect. The correct name is "Gulf Stream," and it is a warm current.
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Option D: Hakuna Hatata – Incorrect. This is not a current; it's a phrase from popular culture meaning "no worries."
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32. A solar eclipse takes place when:
- Option : A
- Explanation : A solar eclipse occurs when the moon passes between the sun and the earth, blocking all or part of the sun's light. This alignment causes the shadow of the moon to fall on the Earth, and it can only happen during a new moon phase.
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Option A: The moon comes between the sun and the earth
Correct. This is the accurate condition for a solar eclipse. -
Option B: The earth comes between the sun and the moon
Incorrect. This describes a lunar eclipse, not a solar one. -
Option C: The sun comes between the moon and the earth
Incorrect. This alignment is not possible due to the positions and motions of the celestial bodies. -
Option D: None of the above
Incorrect. Option A correctly explains a solar eclipse.
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33. Which of the following is the smallest ocean of the world?
- Option : D
- Explanation :
The Arctic Ocean is the smallest of the world's five oceans. It is located around the North Pole and is mostly covered by sea ice throughout the year. Despite being the smallest, it plays a critical role in global climate regulation.
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Option A: Pacific
Incorrect. The Pacific is the largest ocean in the world by both area and volume. -
Option B: Indian
Incorrect. The Indian Ocean is the third-largest, larger than the Arctic but smaller than the Atlantic and Pacific. -
Option C: Atlantic
Incorrect. The Atlantic Ocean is the second-largest ocean in the world. -
Option D: Arctic
Correct. It is the smallest and shallowest of all the oceans.
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34. The planets are kept is motion in their respective orbits by the:
- Option : B
- Explanation : The motion of planets in their respective orbits is maintained by the balance between gravitational force (pulling them toward the Sun) and centrifugal force (resulting from their motion trying to fling them outward). This balance keeps them in stable elliptical orbits around the Sun.
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Option A: Rotation of the sun on its axis
Incorrect. The Sun's rotation does not influence the orbital paths of planets directly. -
Option B: Gravitation and centrifugal forces
Correct. Gravity pulls the planets toward the Sun, while their motion generates a centrifugal force, creating a stable orbit. -
Option C: Great size and spherical shape
Incorrect. These features affect internal structure and gravity but not orbital motion. -
Option D: Rotation and the density of the planets
Incorrect. Rotation and density impact planetary characteristics, not their orbital paths.
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35. Which of the following soil is very hard to cultivate?
- Option : D
- Explanation :
Sandy soil is very hard to cultivate because it has large particles and does not retain water or nutrients well. It dries out quickly, has poor fertility, and requires frequent irrigation and fertilization to support crop growth.
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Option A: Alluvial
Incorrect. Alluvial soil is fertile, easy to work with, and highly suitable for agriculture. -
Option B: Red
Incorrect. Red soil has moderate fertility but can be improved with fertilizers. It is not the hardest to cultivate. -
Option C: Black
Incorrect. Black soil is moisture-retentive and suitable for cotton and other crops, though it can be heavy and sticky when wet. -
Option D: Sandy
Correct. Due to low water retention and nutrient content, sandy soil is the most difficult to cultivate.
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