1. The Earth rotates on its axis from–
(A) West to East (B) East to West
(C) South to North (D) North to South
2. Of the total number of units of solar radiant energy reaching the Earth, how many units get absorbed in the Earth’s atmosphere itself ?
(A) 17 units (B) 21 units
(C) 34 units (D) 14 units
3. Which planet rotates on its axis from East to West?
(A) Earth (B) Moon
(C) Venus (D) Mercury
4. The asteroid belt lies between the orbits of–
(A) Mars and Jupiter (B) Earth and Venus
(C) Mercury and Venus (D) Jupiter and Saturn
5. Match the following–
I. Jupiter II. Mercury III. Uranus IV. Venus
1. Shukra 2. Indra 3. Brihaspati 4. Budha
(A) A-2, B-1, C-4, D-3
(B) A-3, B-1, C-4, D-2
(C) A-4, B-2, C-3, D-1
(D) A-3, B-4, C-2, D-1
6. What are Sunspots?
(A) These are great flames of gases which shoot out of the Sun
(B) These are areas of the Sun where nuclear fission takes place
(C) These are areas of the Sun where the heat is most intense which shows up as dark spots
(D) These are cooler areas which move about on the Sun’s surface and show up as dark spots
7. Which of the following planets takes very nearly the same time for a rotation on its own axis as does the Earth ?
(A) Jupiter (B) Mars
(C) Neptune (D) Uranus
8. Which comet appears every 76 years?
(A) Halley’s (B) Holme’s
(C) Donati’s (D) Alpha Centauri
9. The largest number of natural satellites (or moons) that a planet in the solar system has–
(A) 5 (B) 16
(C) 63 (D) 17
10. Which of the following makes the planet Saturn unique in the Solar family?
(A) It is the biggest among the planets
(B) There is a well-developed system of rings around it
(C) It sends out very strong radio signals which sound like the noise of sea waves
(D) It shows phases like those of the Earth’s Moon
11. On the day the Sun is nearest the Earth, the Earth is said to be in–
(A) Aphelion (B) Perihelion
(C) Apogee(D) Perigee
12. A Comet–
(A) has a tail always pointing away from the Sun
(B) has a tail always pointing towards the Sun
(C) has a tail, sometimes pointing towards the Sun and sometimes away from it
(D) has no tail at all
13. What is the significance of the time-period 26,000 years in relation to the Earth ?
(A) It represents the time taken by the Earth along with the Sun and other planets to complete one round in the Galaxy
(B) It represents the time-period needed for conical movement of the Earth’s axis around a line joining the ecliptic poles for one complete round
(C) It represents the time-period in which Earth’s atmosphere shows perceptible change in its composition
(D) None of the above
14. Which of the following statements regarding the speed at which the planets move around the Sun is not true?
(A) The speed of movement of the planets is not constant
(B) Speed is greater when a planet is nearer to the Sun
(C) Speed is greater when a planet is farther away from the Sun
(D) Speed is less when a planet is farther away from the Sun
15. Johannes Kepler gave to posterity three laws of planetary motions, which he would not have been able to do without astronomical observations. Whose observations did he make use of?
(A) Nicolas Copernicus (B) Galileo Galilei
(C) Ptolemy (D) Tycho Brahe
16. The temperatures at the surface of the Sun and its centre are, respectively,
(A) 6000 K and 20 million K (B) 7000 K and 10 million K
(C) 8000 K and 16 million K (D) 9000 K and 14 million K
17. The Sun consists mostly of–
(A) Helium (B) Hydrogen
(C) Nitrogen (D) Oxygen
18. Nearly what proportion of the total amount of Sun’s energy coming to the Earth is directly reflected back into space by its top atmosphere?
(A) One-tenth (B) One-fifth
(C) One-fourth (D) One-third
19. The number of constellations in the Milky Way Galaxy is–
(A) 6 (B) 9
(C) 12 (D) 15
20. Which of the following planets reflects back to space the highest percentage of light it receives from the Sun compared to any other planet of the Solar System?
(A) Earth (B) Jupiter
(C) Mars (D) Venus