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This quiz consists of 5 multiple choice and 5 short answer questions through Chapter 3 The Expanding Universe.

Multiple Choice Questions

1. The only constant in the universe is what?
(a) Time.
(b) The speed of sound.
(c) Space.
(d) The speed of light.

2. Who discovered the theory of gravity?
(a) Galileo.
(b) Newton.
(c) Hubble.
(d) Einstein.

3. Unlike children, scientists and philosophers, most adults use what to explain away the fundamental questions of the universe?
(a) Logic.
(b) Common sense.
(c) Dreams.
(d) Religion.

4. The distance light travels in an earth year is called what?
(a) Light speed.
(b) Light time.
(c) A light year.
(d) Light distance.

5. For satellites orbiting the earth, time does what in relation to the ground of the earth?
(a) Speeds up.
(b) Runs almost at the same pace.
(c) Remains the same.
(d) Slows down.

Short Answer Questions

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

2. The idea of the big bang arises from what phenomena?

3. Light moves along what sort of lines?

4. Philosophers try to understand the universe using what method?

5. The writer of the Introduction hints that time might be able to move in what direction?

(see the answer key)

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