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This quiz consists of 5 multiple choice and 5 short answer questions through Chapter Fifteen, Prospects.

Multiple Choice Questions

1. What two major branches of modern physics does string theory incorporate?
(a) Gravity and electromagnetism.
(b) Quantum mechanics and general relativity.
(c) General relativity and electromagnetism.
(d) Quantum mechanics and strong-weak duality.

2. What discovery was made that incorporated gravitational force into quantum mechanics via string theory?
(a) A vibrational pattern with the properties of the graviton was discovered.
(b) Gravity could be made symmetric only if the graviton is a string.
(c) At extremely small scales, gravity is fused with the strong force.
(d) Gravity was found to be supersymmetric.

3. According to Greene, what is the underlying principle of string theory?
(a) It has not yet been discovered.
(b) The vibrations of string give particles their properties.
(c) Particles are really strings.
(d) Strings vibrate in ten-dimensional space.

4. What is the shape of all particles, at the smallest possible level, according to string theory?
(a) A one-dimension loop.
(b) A thread of thin strings.
(c) An infinitely long string.
(d) A tangled ball of thin filament.

5. What is M-theory?
(a) A combination of general relativity and string theory.
(b) An open-ended string theory.
(c) A theory that would unite all branches of string theory.
(d) A specialized version of the "Heterotic A" string theory.

Short Answer Questions

1. Which of the following is true regarding experimental confirmation of string theory?

2. General relativity is incompatible with _____.

3. According to general relativity, the change that an object causes in the fabric of space-time depends directly on _____.

4. Which of the following is true regarding the amount of visible matter in the universe compared to the amount of matter required to cause collapse of the universe?

5. It is believed that early on, the universe experienced symmetry breaking, meaning that _____.

(see the answer key)

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