2. What is one question we ask to make sense of the world around us?
(a) Why do I think the way I do?
(b) Why am I here?
(c) Why is the world the way it is?
(d) What do I do on earth?

3. Why did the universe not collapse back on itself shortly after the big bang?
(a) Particles became real and less dense.
(b) Gravity interfered.
(c) There was too much acceleration.
(d) We don't know.

4. If something can escape the event horizon of a black hole, it would be explained by thinking about the behavior of what?
(a) Light.
(b) Particles.
(c) Gravity.
(d) Waves.

5. When Hitler came to power, where was Einstein?
(a) Russia.
(b) America.
(c) Europe.
(d) Germany.

6. What does the letter C stand for in combinations of operations?
(a) Changing heavy particles for light particles.
(b) Changing particles for antiparticles.
(c) Changing matter particles for virtual particles.
(d) Changing positive particles for negative particles.

7. During World War 1, Einstein was a professor in which city?
(a) Berlin.
(b) Frankfurt.
(c) Munich.
(d) Haamburg.

8. What force is the weakest of the four categories of forces?
(a) Gravity.
(b) Light.
(c) Attraction.
(d) Energy.

9. Hawking believes that scientists are too taken up with the "what" of the universe to ask which question?
(a) How?
(b) Why?
(c) Who?
(d) When?

10. Mathematics is the language of what?
(a) Physics.
(b) How things work in the universe.
(c) Engineers.
(d) Natural sciences.

11. To illustrate the concept of disorder in a system, Hawking uses what example in Chapter 9?
(a) A car crash.
(b) A jigsaw puzzle.
(c) A bag of marbles.
(d) A broken vase.

12. Einstein was offered the presidency of which country?
(a) Austria.
(b) Germany.
(c) Palestine.
(d) Israel.

13. What are the basic building blocks of string theory?
(a) Strings that exist only in outer space.
(b) Strings of vibrating energy.
(c) Strings connecting everything with gravitational forces.
(d) Strings of matter.

14. Hawking's model of the universe says the universe will end how?
(a) It will end because black holes will suck all matter in.
(b) It will end because all matter will disappear.
(c) It will never end.
(d) It will end in a big explosion.

15. Galileo belied that the earth did what?
(a) Held still while everything rotated around it.
(b) Was the center of the solar system.
(c) Orbited the sun.
(d) Was the center of the universe.