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This quiz consists of 5 multiple choice and 5 short answer questions through Chapter Twelve, Beyond Strings, In Search of M-Theory.

Multiple Choice Questions

1. In M-theory, what is a two-dimensional oscillating object is called?
(a) A membrane.
(b) A flop.
(c) A blob.
(d) A two-string.

2. What spin do all particles of matter have?
(a) 2.
(b) 1/2.
(c) 3/2.
(d) 1.

3. Which of the following is not one of the four fundamental forces of the universe?
(a) The photoelectric force.
(b) The nuclear-weak force.
(c) The electromagnetic force.
(d) Gravity.

4. What is the Planck mass?
(a) The typical mass of a vibrating string.
(b) The typical energy of a quark.
(c) The typical mass created by quantum foam over one nano-second.
(d) The average mass gained by a string when it changes to a higher-frequency pattern.

5. Kaluza-Klein theory units which two fundamental forces?
(a) Gravity and the strong force.
(b) The strong force and the weak force.
(c) Gravity and electromagnetism.
(d) Electromagnetism and the weak force.

Short Answer Questions

1. What type of a wave is light?

2. Why can the objects predicted by string theory not be observed?

3. In string theory, how do strings interact?

4. Which of the following is true regarding the force of gravity in string theory?

5. What type of motion cannot be felt or sensed by the moving observer?

(see the answer key)

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