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Astronomy
Test Description: Stars, Galaxies and Universe
Instructions: Answer all questions to get your test result.
1) According to information received from radio teslescopes, where is our sun positioned in the Milky Way?
A
just outside the galactic center
B
at the center
C
within one of the spirals
D
at the end of one of the spirals
2) All of the following are true if the Milky Way, except that it
A
is a spiral galaxy.
B
is an elliptical galaxy.
C
has a center bulge and arms.
D
is 100,000 light years across.
3) Scientists know that the universe is expanding because of
A
red shift of the brightest galaxies.
B
blue shift of the brightest galaxies.
C
blue shift of distant galaxies.
D
red shift of distant galaxies.
4) Stars like the Sun will end their life cycle as
A
white dwarf
B
black hole
C
supernova
D
nebula
5) How does a blue star differ from a yellow star?
A
It is hotter.
B
It has a shorter life.
C
all of the above
D
It is brighter.
6) Astronomers have discovered vast differences in stars through their observations. One theory used to explain these differences is that
A
there is too much light pollution on Earth to study stars.
B
stars are at different points in their life cycles.
C
the distances between stars are vast.
D
Earth's atmosphere distorts our view of the star.
7) The statement that the mass of the universe comes entirely from the billions of galaxies which are made of billions of stars is
A
true
B
neither a nor b
C
maybe
D
false
8) Which of the following kinds of stars will have average brightness and temperature?
A
white dwarfs
B
main sequence
C
supergiants
D
giants
9) How do elements with atomic numbers greater than that of lithium form?
A
nuclear fusion
B
meteor impact
C
nuclear fission
D
radioactive decay
10) What holds planets, stars, gas and dust together in a galaxy?
A
friction
B
gravity
C
inertia
D
forces
*select an answer for all questions
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