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

2. What might escape from a black hole?
(a) Something with more gravitational force than a black hole.
(b) Photons.
(c) Nothing.
(d) Gamma rays.

3. Gamma ray detection might be able to be used to detect what?
(a) White dwarfs.
(b) Black holes.
(c) Pulsars.
(d) Quasars.

4. What is one thing particles do when they enter a black hole?
(a) Become destroyed.
(b) Become very dense.
(c) Stop emitting light.
(d) Cause the emission of other particles.

5. Which virtual particle carries the electromagnetic force?
(a) Electron.
(b) Proton.
(c) Photon.
(d) Magnetron.

Short Answer Questions

1. How close is the closest star, other than the sun, to earth?

2. When Hubble discovered other galaxies, in what direction were they moving?

3. Why do researchers want to find black holes?

4. How many miles does light travel in one earth year?

5. Who published a paper on Brownian motion in 1905?

(see the answer key)

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