galaxy earth science help?

1. A galaxy whose stars are symmetrically dispersed in a spherical or flattened shape is _____ galaxy.

a spiral

an irregular

an elliptical

a cluster

a group

2. The Milky Way is _____ galaxy.

a cluster

a barred spiral

an irregular

an elliptical

a group

3. A galaxy whose stars are arranged in a disk with arms that surround a central bulge is _____ galaxy.

an irregular

an elliptical

a cluster

a spiral

a group

4. The Milky Way is located in the _____ Group.

Andromeda

Local

Elliptical

Spiral

Virgo

5. A galaxy cluster contains between _____ galaxies.

5 to 50

50 to 1,000

1,000 to 5,000

5,000 to 10,000

10,000 to 50,000

6. Most irregular galaxies are thought to have formed _____.

from nebulas that cooled very quickly

right after the big bang

from cosmic background radiation

from collisions between other galaxies

7. What are the basic shapes into which astronomers classify most galaxies?

irregular

elliptical

cluster

spiral

spherical

8. The most common shape for a galaxy is ______.

irregular

elliptical

cluster

spiral

spherical

9. Astronomers expect the Milky Way to collide with Andromeda in the future.

True

False

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