Glencoe Earth Science

Chapter 25: Stars and Galaxies

Section 4 Self-Check Quiz-Eng.

1.
What holds planets, stars, gas, and dust together in a galaxy?
A)inertia
B)forces
C)gravity
D)friction
2.
Which, if any, of the three types of galaxies occur the most often?
A)irregular
B)spiral
C)elliptical
D)They occur in equal amounts.
3.
The Moon orbits Earth and Earth orbits the Sun. What does the Sun orbit?
A)the Milky Way
B)the universe
C)It doesn't orbit.
D)the solar system
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