Motion of the earth on its axis in about 24 hours is called
  • revolution
  • rotation
  • both (a) and (b)
  • none of these
Motion of the earth around the sun is known as
  • revolution
  • rotation
  • both (a) and (b)
  • none of these
What is orbital plane?
  • Plane formed by the axis
  • Plane formed by the orbit
  • Both (a) and (b)
  • None of these
Which one of the following is the source of light on the earth?
  • The moon
  • The sun
  • The satellite
  • The space
The circle that divides the globe into day and night is called
  • circle of darkness
  • circle of day and night
  • circle of illumination
  • none of these
The period of one rotation of the earth is known as
  • the sun day
  • the moon day
  • the earth day
  • none of these
What would have happened if the earth did not rotate?
  • Cold conditions on earth’s half portion
  • Warm conditions on earth’s another half portion
  • No life possible in such extreme conditions
  • All of these
A year with 366 days is called
  • leap year
  • normal year
  • both (a) and (b)
  • none of these
Why do seasons change on the earth?
  • Due to change in the position of the earth around the sun
  • Due to no change in the earth’s position
  • Both (a) and (b)
  • None of the above
When do the longest day and the shortest night occur in the northern hemisphere?
  • June 21
  • September 23
  • December 22
  • March 21
In which season Christmas is celebrated in Australia?
  • Winter season
  • Summer season
  • Autumn season
  • Spring season
When do equinoxes occur on the earth?
  • March 21
  • September 23
  • Both (a) and (b)
  • None of these
Days and nights occur on earth due to
  • rotation
  • revolution
  • both (a) and (b)
  • none of these
Change of seasons occurs on earth due to
  • rotation
  • revolution
  • both (a) and (b)
  • none of these
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