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1. Which of the following is called twin of earth?
A. Neptune
B. Venus
C. Mars
D. Saturn
ANSWER: B.Venus
SOLUTION :Venus is called Earth’s twin because Venus and Earth are almost the same size, have a very similar composition, and approximately have about the same mass.
2. The light from the Sun reaches the earth in ______.
A. 8 Seconds
B. 8 Minutes
C. 10 Seconds
D. 10 Minutes
ANSWER: B.8 Minutes
SOLUTION:Light from the sun takes about 8 minutes and 20 seconds to reach Earth. This is because the sun is about 150 million kilometers away from Earth, and light travels at a speed of 300,000 kilometers per second.
3. Which is the hottest planet in the solar system?
A. Jupiter
B. Saturn
C. Venus
D. Uranus
ANSWER : C.Venus
SOLUTION:Venus is the second planet from the Sun, and the sixth largest planet. It’s the hottest planet in our solar system.
4. The outer most layer of the Sun is called _____.
A. Chromosphere
B. Photosphere
C. Corona
D. Lithosphere
ANSWER: C. Corona
SOLUTION:The Corona layer is the outermost layer of the Sun’s atmosphere, and it lies above the Chromosphere. During a total Solar Eclipse, it can be seen as a white glowing Corona.
5. The planet nearest to the solar system ______.
A. Earth
B. Mercury
C. Mars
D. Venus
ANSWER: B.Mercury
SOLUTION:Mercury is the planet closest to the sun in our solar system. It’s also the smallest planet, only slightly larger than Earth’s moon, and orbits the sun every 88 days. Because of its proximity to the sun, Mercury experiences extreme temperature changes between night and day.
6. Which of the following is called “Blue Planet”?
A. Saturn
B. Earth
C. Jupiter
D. Mars
ANSWER: B.EarthBR> SOLUTION: Over 71 percent of the Earth is covered with water. Therefore from outer space it appears blue and so Earth is called the ‘Blue Planet’.
7. Day and Night are equal at the _____.
A. Prime Meridian
B. Antarctic
C. Poles
D. Equator
ANSWER: D.Equator
SOLUTION: On the Day of equinox, the entire earth experience equal days and nights. An equinox occurs when the plane of Earth’s equator passes through the center of the Sun. It takes place twice in a year-March 21 and September 23.
8. On which date is India likely to experience the shortest day?
A. December 22
B. March 21
C. June 22
D. September 23
ANSWER: A.December 22
SOLUTION: We know India lies in the Northern Hemisphere as it lies above the Equator. The shortest day in the Northern Hemisphere is on December 22nd, when the Sun is directly overhead the tropic of Capricorn.
9. The only planet whose period of rotation is longer than the period of revolution around the sun?
A. Mercury
B. Jupiter
C. Venus
D. Neptune
ANSWER: C.Venus
SOLUTION: Venus is the planet whose period of rotation is longer than the period of revolution around the sun. The period of rotation for Venus is 243 days to turn once on its axis whereas it takes 224.7 days to revolve around the sun.
10. The longest duration of the year happens on which of the following planet?
A. Saturn
B. Jupiter
C. Neptune
D. Earth
ANSWER: C.Neptune
SOLUTION:Given its distance from the Sun, Neptune has the longest orbital period of any planet in the Solar System. As such, a year on Neptune is the longest of any planet, lasting the equivalent of 164.8 years (or 60,182 Earth days).