Stars and The Solar System Worksheet-7

Stars and The Solar System Worksheet-7

1. Pole star appears to be stationary in all seasons because:

(a) pole star does not rotate on its axis

(b) pole star happens to lie on the axis of equator

(c) pole star happens to lie above the axis of north pole of the earth

(d) pole star is most distant of all the stars

2. Live telecast of a cricket match is possible due to:

(a) geostationary Satellite

(b) polar satellite

(c) low-earth orbiting satellite

(d) sun-synchronous satellite

3. Where do you find the "sea of tran­quility"?

(a) Moon            (b) Earth            (c) Mercury       (d) Mars

4. Mercury is closer to the sun than the Venus. But Venus is hotter than Mercury. Give reason.

(a) Venus has no atmosphere and Mercury has a thick atmosphere which can retain the heat

(b) Mercury is mostly made up of sedimentary rocks while Venus contains igneous rocks

(c) Mercury being closer to the sun, sun absorbs the heat of the Mercury

(d) All of these

5. Cosmic year is:

(a) the time taken by the earth to revolve around the sun

(b) the time taken by the sun to revolve around itself

(c) the time taken by the earth to revolve around itself

(d) the time taken by our milky way galaxy to revolve around itself

6. The closely packed part of the comet which contains solid particles, stones and frozen water is called:

(a) Coma           (b) Nucleus       (c) Tail               (d) Orbit

7. The fastest planet of the solar system is:

(a) Mercury      (b) Uranus        (c) Jupiter         (d) Neptune

8. Anurag recorded two observations of the Great Bear and Pole Star in a night as shown here.

Which of the following will be his recording at 3 A.M.?

(a)                               (b)

(c)                               (d)

9. Which of the planets is brightest?

(a) Mercury      (b) Venus           (c) Mars             (d) Jupiter

10. The planet nearest to the earth is

(a) Venus           (b) Mercury      (c) Jupiter         (d) Mars

Answer Key:

(1)-(c); (2)-(a); (3)-(a); (4)-(a); (5)-(d); (6)-(b); (7)-(b); (8)-(c); (9)-(b); (10)-(a)