1.
The origin of the universe is explained by
_____________ theory.
2.
A _____________ is a massive cluster of hundreds and
millions of stars orbiting around a centre.
3.
______________ are big ball of fire. They produce heat
and light.
4.
The rays of the sun takes ____ minutes to reach the
earth’s surface.
5.
________________ was the ninth planet in the solar
system but lost its position and has been declared as dwarf planet.
6.
The _____________ helped farmers in ancient period to
decide seasons.
7.
The __________ and ___________ along with their
______________ form the solar system.
8.
___________ are heavenly bodies that revolve around
the sun on a set path known as _________________.
9.
_____________ are heavenly bodies that revolve around
the planets.
10.
_____________ and _____________ are examples of
galaxies.
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