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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 time not have apart from the universe?
(a) Dependent meaning.
(b) Illegitimate significance.
(c) Futuristic tendencies.
(d) Independent meaning.

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

3. How can one find black holes?
(a) By seeking out the matter that revolves around finite space.
(b) By seeking out the matter that orbits around a visible object.
(c) By finding the mass of everything invisible.
(d) By finding matter that orbits around a seemingly invisible object.

4. What kind of energy density might an advanced civilization be able to create?
(a) An energy density finite on a spatial plane.
(b) An energy density finite on a time boundary.
(c) An energy density infinite on a spatial boundary.
(d) An energy density infinite on a level ground.

5. What does Hawking believe the possibility of intelligent beings depends on?
(a) The amount of matter in the universe.
(b) The amount of thought in the universe.
(c) The amount of time in the universe.
(d) The amount of space in the universe.

Short Answer Questions

1. On what scale does Hawking think time travel occurs?

2. What may the no boundary condition imply?

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

4. What human conceptions did Einstein's papers change?

5. If there is a low amount of matter in the universe what will happen?

(see the answer key)

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