Match the following:
Column 'A'
1. Winter Solstice
2. Summer Solstice
3. Spring Equinox
4. Autumnal Equinox
5. Aphelion
6. Perihelion
Column 'B'
(a) When the position of the Earth is closed to the sun.
(b) 21st of June.
(c) When the Earth is at its farthest distance from the sun.
(d) 23rd of September.
(e) 22nd of December
(f) 21st of March.
Answers
Explanation:
The speed of the earth's rotation at the equator is about
a. 1,675 m per second
b. 1,675 km per hour
c. 1,675 miles per hour
d. 1,675 km per minute
ANSWER:
The correct answer is option (b).
Explanation: The Earth’s rotational speed at the Equator is 1,675 km/h. The Earth's rotational speed is maximum at the Equator; it reduces as we move towards the poles.
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Question A.2:
The time of the day just before sunrise is known as
a. dusk
b. twilight
c. dawn
d. morning
ANSWER:
The correct answer is option (c).
Explanation: During the dawn, the Sun remains below the horizon, so the Earth receives very less sunlight.
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Question A.3:
Which of the following places enjoy day and night throughout the year?
a. Antarctic Circle
b. Tropic of Cancer
c. Equator
d. Tropic of Capricorn
ANSWER:
The correct answer is option (c).
Explanation: The Equator receives direct rays of the Sun throughout the year, so the length of the day and that of the night experienced at the Equator never change.
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Question A.4:
In which of the following years, February has 29 days?
a. 2000
b. 2010
c. 2014
d. 2006
ANSWER:
The correct answer is option (a).
Explanation: A leap year is evenly divisible by 4 and 400.
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Question A.5:
Which one of the following factors is not responsible for the phenomenon of seasons?
a. Rotation of earth
b. Revolution of earth
c. Earth's inclination
d. Gravitational pull on sun
ANSWER:
The correct answer is option (d).
Explanation: The factors given in options (a), (b) and (c) have serious effects on seasons. However, the factor given in option (d), i.e. the gravitational pull of the Sun, does not affect seasons.
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Question A.6:
The longest day in the Southern Hemisphere is on
a. 22 March
b. 22 September
c. 21 June
d. 22 December