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WorksheetsPS Test 2 (8th) 21-22
Total questions: 20
Worksheet time: 16mins
Each star is born and goes through a life cycle and eventually dies.
True
False
A nebula is
a tiny cloud of gas and dust dispersed in a very big volume.
an inmense cloud of gas and dust dispersed in a very big volume.
an inmense cloud of gas and dust dispersed in a very small volume.
All stars begins as nebulas
True
False
A protostar is
a dense cloud of gas and dust due to gravitational forces
a star
an expanding cloud of gas and dust with enough mass
A protostar is not a regular star yet because
its hydrogen is not "burning". Therefore it is not really bright
its hydrogen is "burning".
none of the above
Big stars consume their fuel slower than small stars.
True
False
Big stars have longer lives than small stars
True
False
When stars run out of hydrogen, its core begin to shrink.
True
False
When stars die, they can become
white dwarfs or neutron stars
white dwarf or black holes
white dwarfs, neutron stars or black holes
What is a Binary System?
A star systems that have two stars
A star systems that have three stars
A star systems that have one star
Often in a binary system, one star is much brighter and more massive than the other.
True
False
Describe what is happening?
Explain what is happening
There are two major type of star clusters. OPEN and GLOBULAR clusters.
True
False
A galaxy is a group of single stars, star systems, stars clusters, dust and gas bound together by gravity.
True
False
Which one is our galaxy?
Andromeda
Milky Way
Zenkia
The Milky Way is part of a cluster of 50 galaxies called the Local Group
True
False
Explain the image
Which one is correct, in terms of size?
Universe > Virgo Suplercluster > Local Group > Milky Way
Universe < Virgo Suplercluster < Local Group < Milky Way
None of the above
Clusters of galaxies are separated by vast regions of:
Hot gas
Empty space
Cold gas
