Worksheetsprep 3 , unit 3 , part 1
Total questions: 10
Worksheet time: 5mins
The number of galaxies in the universe is about .......... Million
10 000
100 000
20 000
200 000
The building units of the universe are
planets
stars
galaxies
moons
Galaxies gather in groups known as
galaxies clusters
ancestral galaxies
galaxy centre
Venus
............... is the star of our solar system.
Moon
GGalaxy
SSun
TThe earth
The Sun and the surrounding planets revolve around the
Earth
Moon
GGalaxy centre
the solar system
The solar system consists of the Sun and
nine planets
eight planets
200 000 galaxies
the solar system
The solar system is located in one of the arms of the Milky Way galaxy.
spiral
cylindrical
straight
spherical
The Sun takes about ...... to complete one rotation around the centre of the galaxy.
220 thousand years
220 million years
202 million years
202 years
Astronomers measure the distances between stars with light year, because the stars
generate great amounts of light
seem as small light dots in the sky
are millions of kilometres away from each other
generate great amount of heat
The scientists believe that the universe emerged from a massive explosion and it is in
continues contraction
contraction then expansion
expansion then contraction
continues expansion
