400. Halley"s comet appears in the heavens once in
(a) 40 years
(b) 50 years
(c) 76 years
(d) 80 years
Ans: (c)
401. The planet that is known as earth"s twin is
(a) Mercury
(b) Venus
(c) Moon
(d) Mars
Ans: (b)
402. The temperature, surface features, length of days and nights of a planet
depend on
(a) its atmosphere
(b) its distance from the sun
(c) its rotation
(d) All the above
Ans: (d)
403. The earth"s nearest neighbour in space is
(a) the Sun
(b) the Moon
(c) the Venus
(d) the Mars
Ans: (b)
404. The asteroids belt lies between the orbits of
(a) Earth and Mars
(b) Venus and Earth
(c) Mars and Jupiter
(d) Moon and Mars
Ans: (c)
405. The difference between planets and stars is
130