Earth - Study Mode

[#166] The distance of the equator from either of the poles is ________
Correct Answer

(C) 10,002 km

Explanation

Solution: The distance of the equator from either of the poles is 10,002 km.

[#167] The Earth rotates-around an axis pointing towards ________
Correct Answer

(B) The pole star

Explanation

Solution: The Earth rotates-around an axis pointing towards the Pole star. The axis of rotation of the Earth passes very close to the Pole Star. The earth rotates around the sun, but the polar star is always in the north.

[#168] When a ship crosses Date line from west to east ________
Correct Answer

(B) It gains one day

Explanation

Solution: When a ship crosses the International Date Line from west to east, it adds a day, and if it crosses the line from east to west, it subtracts a day.

[#169] Which of these statements are correct? 1. Ocean currents are the slow-surface movement of water in the ocean 2. Ocean currents assist in maintaining the Earth's heat balance 3. Ocean currents are set in motion primarily by prevailing winds 4. Ocean current are affected by the configuration of the ocean
Correct Answer

(B) 2, 3 and 4

Explanation

Solution: The Ocean currents are not only slow but also could be fast, so 2, 3 and 4 statements are correct.

[#170] ________ is a natural electrical phenomenon characterized by the appearance of streams of reddish or greenish light in the sky, especially near the northern or southern magnetic pole
Correct Answer

(D) Aurora

Explanation

Solution: Aurora is a natural electrical phenomenon characterized by the appearance of streams of reddish or greenish light in the sky, especially near the northern or southern magnetic pole. Aurora is a light display phenomenon which often takes place in the polar regions. In this phenomenon electrons collide with upper atmosphere of Earth and when they cool down they release energy in the form of light.