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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) Covers more space.
(b) Increases to almost infinity.
(c) Decreases to almost nothing.
(d) Stays the same.

2. The universe is largely made up of what?
(a) Stars.
(b) Empty space.
(c) Dark matter.
(d) Planets.

3. Black holes are similar to the singularity that existed before what event?
(a) The expansion of the universe.
(b) The destruction of cluster galaxies.
(c) The creation of the earth.
(d) The big bang.

4. Who created the idea that a star can collapse and become a black hole?
(a) Alexander Friedmann.
(b) Roger Penrose.
(c) Arno Penzias.
(d) Robert Wilson.

5. Groups of atoms create what?
(a) Empty space.
(b) Protons.
(c) Matter.
(d) Electrons.

Short Answer Questions

1. Light moves along what sort of lines?

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

3. Who developed the uncertainty principle?

4. Black holes can capture matter particles and what other type of particles?

5. The distance light travels in an earth year is called what?

(see the answer key)

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