Daily Quiz- 245
Equinox
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1. During an equinox, which of the following occurs globally?
A) Equal duration of day and night at all latitudes
B) Sun directly overhead at the Tropics
C) Longest day in Northern Hemisphere
D) Polar regions experience 24-hour daylight
2. The term “equinox” literally means:
A) Equal distance from the Sun
B) Equal sunlight distribution
C) Equal day and night
D) Equal solar altitude
3. On March 21, if the Sun is directly overhead at the Equator, an observer at 45°N will find:
A) Sun rises north of east
B) Sun rises due east
C) Sun rises south of east
D) Sun does not rise
4. Which of the following statements is incorrect regarding equinoxes?
A) The equinoxes occur twice every year.
B) Solar declination is 0°.
C) The Arctic Circle experiences 24 hours of daylight.
D) The Sun is directly over the Equator.
5. During the September equinox, which of the following is true?
A) Sun’s vertical rays strike the Tropic of Cancer
B) Northern Hemisphere experiences increasing daylight
C) Southern Hemisphere enters spring
D) Earth is at aphelion
Answers Quiz-244
1. B
Explanation: The tilt (obliquity) of 23.5° refers to the angle between Earth’s rotational axis and the perpendicular to the plane of its orbit around the Sun, i.e., the ecliptic plane.
2. A
Explanation: Without tilt, every point would receive equal day and night all year, and there would be no seasons.
3. B
Explanation: Earth’s tilt varies between 22.1°–24.5° over Rs 41,000 years due to axial precession and nutation, influencing climatic cycles (Milankovitch cycles).
4. C
Explanation: During the June solstice, the North Pole is tilted toward the Sun, causing continuous daylight in regions near the Arctic Circle.
5. A
Explanation: Day-night alternation is due to rotation, not tilt. Tilt revolution causes seasonal variation in sunlight.
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