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Galaxies (Grade 9)

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Galaxies

1. 
What is a galaxy?
  1. a large group of stars held together by gravity
  2. a system of planets and its moons
  3. a system of planets orbiting a star
  4. a group of comets
2. 
Who proved that galaxies exist?
  1. Edwin Hubble
  2. Isaac Newton
  3. Tyro Brahe
  4. Charles Messier
3. 
Which is not a type of galaxy?
  1. spiral
  2. elliptical
  3. regular
  4. irregular
4. 
The greater the distance of a galaxy away from the earth
  1. the older it is.
  2. the greater the observed blue shift.
  3. the more massive it is.
  4. the greater the observed red shift.
5. 
Extremely distant, bright, energetic object located in the core of some active galaxies.
  1. pulsar
  2. quasar
  3. black hole
  4. white dwarf
6. 
Which set of terms is arranged from smallest to largest?
  1. galaxy, star, cluster, supercluster
  2. star, supercluster, cluster, galaxy
  3. galaxy, supercluster, star, cluster
  4. star, galaxy, cluster, supercluster
7. 
The Milky Way galaxy is a(n)
  1. spiral galaxy
  2. elliptical galaxy
  3. irregular galaxy
  4. barred spiral galaxy
8. 
M89 is an elliptical galaxy classified as E0. NGC 584 is an E4 elliptical galaxy. Which statement best compares the morphology of the two galaxies?
  1. M89 is has a more elliptical shape than NGC 584
  2. NGC 584 has a more elliptical shape than M89
  3. Both M89 and NGC 584 have very elliptical shapes
  4. Both M89 and NGC 584 have very spherical shapes
9. 
Messier 95 is classified as a SBb galaxy using the Hubble sequence. Which of the following best describes the classification of Messier 95?
  1. a spiral galaxy
  2. an elliptical galaxy
  3. an irregular galaxy
  4. a barred spiral galaxy
10. 
Collisions between galaxies are believed to be                                    and result in                                   .
  1. common; new star formation
  2. uncommon; new star formation
  3. common; frequent star collisions
  4. uncommon; frequent star collisions
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