1. The exact time taken by the earth for single rotation on its own axis is:
a) 24 hrs
b) 24 hrs 35 sec
c) 23 hrs 50 minutes 7.2 sec
d) 23 hrs 56 minutes 4.09 sec
2. Consider the following astral bodies:
1. Sirius
2. Venus
3. Mars
The correct sequence in decreasing order of their brightness is :
a) 2, 3, 1
b) 1, 2, 3
c) 3, 2, 1
d) 2, 1, 3
3. Lunar Sea refers to :
a) a small sea on the moon
b) a sea on earth which experiences high tides due to gravitational attraction of the moon
c) a dark plain on the moon
d) a light water body illuminated by the moon-light
4. 'Parsec' is the unit of measurement of:
a) density of stars
b) astronomical distance
c) brightness of heavenly bodies
d) orbital velocity of giant stars
5. The sunspots cause:
a) aurora borealis and aurora australis
b) magnetic storms on the surface of the sun
c) polar auroras
d) all of these
6. The light coming from stars gives the idea of their:
a) size
b) rotational speed
c) mass
d) temperature
7. The Milky way extends through a distance:
a) 1 light year
b) 8 light years
c) 105
light years
d) 1010 light years
8. The period of one revolution of sun around the centre of galaxy is called:
a) Parsec
b) Astronomical year
c) Cosmic year
d) Light year
9. Super Nova is :
a) an asteroid
b) a black hole
c) a comet
d) a dying star
10. The altitudes of heavenly bodies appear to be greater than they actually are. This is
due to:
a) vertical motion of these heavenly bodies
b) motions of the earth
c) atmospheric refraction
d) these are visible because of light of the sun reflected from their surface