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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