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This quiz consists of 5 multiple choice and 5 short answer questions through Chapter Fifteen, Prospects.

Multiple Choice Questions

1. In which particle was spin first discovered?
(a) The photon.
(b) The neutron.
(c) The proton.
(d) The electron.

2. According to general relativity, all objects that have mass have what effect on space-time?
(a) They stretch space-time for other very distant objects.
(b) They tear space-time when they travel at near-light speeds.
(c) They warp space-time around them.
(d) They fold space-time as they move past one another.

3. How many dimensions did the tiny objects involved in the original statement of string theory have?
(a) One.
(b) Two.
(c) Three.
(d) Four.

4. What distinction does dark matter have?
(a) It does not give off light.
(b) It is composed of anti-matter.
(c) It exists in curled-up dimensions.
(d) It can spontaneously form black holes.

5. According to Einstein's theory of general relativity, if two objects have a gravitational pull on one another, and one changes its mass or distance from the other, how quickly does the effect of this change travel to the other object?
(a) Instantaneously.
(b) Near the speed of light, faster for lighter objects.
(c) Near the speed of light, faster for more massive objects.
(d) At exactly the speed of light.

Short Answer Questions

1. What discovery was made that incorporated gravitational force into quantum mechanics via string theory?

2. Why are the extra dimensions needed in string theory?

3. What type of motion cannot be felt or sensed by the moving observer?

4. About how old is the universe?

5. What is the scientific state of the "multiverse" theory?

(see the answer key)

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