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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?

Aat the end of one of the spirals Bwithin one of the spirals Cjust outside the galactic center Dat the center

2) All of the following are true if the Milky Way, except that it

Ais a spiral galaxy. Bis 100,000 light years across. Chas a center bulge and arms. Dis an elliptical galaxy.

3) Scientists know that the universe is expanding because of

Ablue shift of the brightest galaxies. Bred shift of distant galaxies. Cred shift of the brightest galaxies. Dblue shift of distant galaxies.

4) Stars like the Sun will end their life cycle as

Asupernova Bblack hole Cnebula Dwhite dwarf

5) How does a blue star differ from a yellow star?

Aall of the above BIt has a shorter life. CIt is hotter. DIt is brighter.

6) Astronomers have discovered vast differences in stars through their observations. One theory used to explain these differences is that

Astars are at different points in their life cycles. Bthere is too much light pollution on Earth to study stars. Cthe distances between stars are vast. DEarth'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

Afalse Bmaybe Cneither a nor b Dtrue

8) Which of the following kinds of stars will have average brightness and temperature?

Agiants Bmain sequence Cwhite dwarfs Dsupergiants

9) How do elements with atomic numbers greater than that of lithium form?

Anuclear fission Bmeteor impact Cradioactive decay Dnuclear fusion

10) What holds planets, stars, gas and dust together in a galaxy?

Agravity Binertia Cforces Dfriction

*select an answer for all questions

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