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This quiz consists of 5 multiple choice and 5 short answer questions through Chapter 9 The Arrow of Time.

Multiple Choice Questions

1. As an observer's velocity comes close to the speed of light, the observer's mass does what?
(a) Stays the same.
(b) Increases to almost infinity.
(c) Covers more space.
(d) Decreases to almost nothing.

2. When was the uncertainty principle developed?
(a) 1919.
(b) 1926.
(c) 1920.
(d) 1929.

3. How does Hawking define scientific theory?
(a) A model of the universe that predicts some events, but isn't accurate.
(b) A model of the universe with a set of rules.
(c) A model of the universe that meets common sense expectations.
(d) A model of the universe made up of molecules.

4. The theory of quantum mechanics best describes what world?
(a) The small world of particles.
(b) The small world of sub-atomic particles.
(c) The small world of molecules.
(d) The small world of atoms.

5. There must be a beginning and an end to the universe if what theory is used?
(a) Theory of relativity.
(b) Singulatiry theory.
(c) Theory of light.
(d) Quantum mechanics.

Short Answer Questions

1. "We see the universe the way it is because we exist," demonstrates what principle?

2. What is another name for a neutron star?

3. What does the letter C stand for in combinations of operations?

4. Hawking used what kind of space-time to reach the conclusion that the universe is similar to a sphere?

5. What might escape from a black hole?

(see the answer key)

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