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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
at the end of one of the spirals
D
within 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
is 100,000 light years across.
D
has a center bulge and arms.
3) Scientists know that the universe is expanding because of
A
blue shift of distant galaxies.
B
red shift of the brightest galaxies.
C
red shift of distant galaxies.
D
blue shift of the brightest galaxies.
4) Stars like the Sun will end their life cycle as
A
nebula
B
black hole
C
white dwarf
D
supernova
5) How does a blue star differ from a yellow star?
A
all of the above
B
It has a shorter life.
C
It is hotter.
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
the distances between stars are vast.
B
Earth's atmosphere distorts our view of the star.
C
stars are at different points in their life cycles.
D
there is too much light pollution on Earth to study stars.
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
false
B
neither a nor b
C
maybe
D
true
8) Which of the following kinds of stars will have average brightness and temperature?
A
giants
B
main sequence
C
white dwarfs
D
supergiants
9) How do elements with atomic numbers greater than that of lithium form?
A
meteor impact
B
nuclear fusion
C
radioactive decay
D
nuclear fission
10) What holds planets, stars, gas and dust together in a galaxy?
A
forces
B
gravity
C
friction
D
inertia
*select an answer for all questions
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