The Search for Dark Energy and Dark Matter Video Questions

1. The ordinary matter of the universe make up _________ of the content of the universe.
   1. 1-4
   2. 5-10
   3. 11-20
   4. >20
      
      
2. ______ of the matter in the universe is invisible!
   1. ¼
   2. ½
   3. ¾
   4. all
      
      
3. How do we know dark matter is there?
   1. Its gravitational effect
   2. We can see it
   3. It makes noise
   4. It emits light
      
      
4. Where is most of the mass in a  Spiral galaxy?
   1. The outside
   2. The center
   3. It is evenly distributed
   4. On the arms
      
      
5. Stars on the inside of a galaxy are SUPPOSED to move __________then the ones moving on the outside.
   1. Slower
   2. Faster
      
      
6. Why are the outside stars moving the same speed as the inside stars?
   1. Dark energy
   2. Dark matter
   3. Kepler’s second law of planetary motion
      
      
7. When we look at galaxies how much more mass is dark matter than ordinary matter?
   1. 10 x
   2. 20 x
   3. 50 x
   4. 90 x
      
      
8. The gravitational field due to mass will deflect ______!!
   1. Sound
   2. Light
   3. Heat
      
      
9. What is an Einstein ring?
   1. His wedding ring
   2. The cone of light from the distortion of a mass of starts
   3. His favorite cell phone ring
   4. A circular arrangement of stars
      
      
10. Space is expanding at a ___________ rate than it was a few billion years ago
    1. Slower
    2. Faster
    3. Slower than faster
    4. Faster than slower