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This quiz consists of 5 multiple choice and 5 short answer questions through Chapter 5, Protecting the Past.

Multiple Choice Questions

1. What does Hawking think black holes radiate?
(a) Heat.
(b) Energy.
(c) Sound.
(d) Light.

2. When was absolute time overthrown as an idea?
(a) Ten years ago.
(b) Fifty years ago.
(c) The idea was never overthrown.
(d) Over 100 years ago.

3. What do cosmic strings allow space-time to do?
(a) Curve around them.
(b) Push them closer together.
(c) Push them apart.
(d) Separate them.

4. What is a p = 2 brane?
(a) A ladder.
(b) A wall.
(c) A surface.
(d) A geometrical unit.

5. What was discovered in the 1970s that revealed a natural physical mechanism?
(a) A new sort of symmetry.
(b) A new sort of timewarp.
(c) A new sort of planck.
(d) A new sort of plane.

Short Answer Questions

1. What is thought to expand at an accelerating rate in our universe?

2. What did Penrose and Hawking demonstrate concerning General Relativity?

3. Who were unconvinced by the ideas of an infinite past and future?

4. What two things are considered capable of shaping space-time, according to Einstein?

5. What are singularities?

(see the answer key)

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