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This quiz consists of 5 multiple choice and 5 short answer questions through Chapter 5 Elementary Particles and the Forces of Nature.

Multiple Choice Questions

1. Why do the theories of quantum mechanics and general relativity need to be unified?
(a) To accurately describe future events.
(b) To accurately calculate observations.
(c) To accurately describe the very small and the very large.
(d) To accurately describe the fate of the universe.

2. All the particles in the universe are what type of spin?
(a) One.
(b) One-half.
(c) Zero.
(d) Two.

3. Hawking co-authored a paper in what year that explains the big bang theory?
(a) 1977.
(b) 1985.
(c) 1970.
(d) 1980.

4. What does a particle with 0 spin look like?
(a) Identical in all directions.
(b) Different only if spun half way around.
(c) Different from different directions.
(d) Different after It makes two full rotations.

5. What travels at the speed of 186,000 miles per second?
(a) Sound.
(b) Electrons.
(c) Light.
(d) Waves.

Short Answer Questions

1. How close is the closest star, other than the sun, to earth?

2. Stephen Hawking has what disease?

3. In order to explain how black holes become a big bang, Hawking needs to include what?

4. Scientists start their understanding of the universe with what?

5. As an observer's velocity comes close to the speed of light, the observer's mass does what?

(see the answer key)

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