1. Galaxy Review

2. Astronomers estimate that the universe contains
100 galaxies
100 million galaxies
100 billion galaxies
100 trillion galaxies

3. 100 billion galaxies

4. Clusters of galaxies form larger groups called
Supernovas
Superclusters
Constellations
Supergiants

5. Superclusters

6. Quasars are thought to be the centers of
Distant nebulas
Distant constellations
Distant galaxies
Distant clusters

7. Distant galaxies

8. Quasars were named for their
Absorption of radiation
Generation of radiation
Resemblance to galaxies
Resemblance to stars

9. Resemblance to stars

10. Astronomers group galaxies based on their
Shape
Size
Colors
ages

11. shape

12. Quasars are among the strongest sources of ____________ in the universe.
Planets
Sound waves
Radio waves
microwaves

13. Radio waves

14. Our galaxy is classified as a
Spiral
Elliptical
Irregular
peculiar

15. spiral

16. The universe is made up of mostly
Dark matter
Dark energy
Stars
Empty space

17. Empty space

18. The number of universes known to exist is
One
One hundred
One million
One billion

19. one

20. ______________ block the view of the center of the Milky Way.
Stars and moons
Blackholes
Gas and dust
Planets and stars

21. Gas and dust

22. The name of the galaxy cluster that the Milky Way belongs to is the
Virgo Cluster
Local Group
Inner Group
Virgo Super Cluster

23. Local Group

24. Our solar system is located in the _____ Arm the Milky Way Galaxy.
Centarus
Perseus
Sagittarius
Orion

25. Orion

26. Which answer best describes the disk of a galaxy?
Mostly older stars, not much gas and dust.
Mostly older stars, lots of gas and dust.
Mostly younger stars, not much gas and dust.
Mostly younger stars, lots of gas and dust.

27. Mostly younger stars, lots of gas and dust.

28. Which answer best describes the bulge of a galaxy?
Made up of old stars in galactic clusters.
Made up of old stars in globular clusters.
Made up of young stars in galactic clusters.
Made up of young stars in globular clusters.

29. Made up of old stars in globular clusters.

31. spiral

33. elliptical

35. irregular

37. spiral

39. spiral

41. irregular

43. elliptical

45. irregular

47. elliptical

49. spiral