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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 shape allows for the vibrational patterns that we observe in our universe?
(a) The Kaluza-Klein shape.
(b) The Einstein matrix.
(c) The Calabi-Yau space.
(d) The six-dimensional torus.

2. When the universe is at its smallest possible size, which other property is also at its maximum?
(a) The string coupling constant.
(b) The Planck tension.
(c) Its temperature.
(d) The cosmological constant.

3. Which of the following is true of a particle's spin?
(a) It is constant for that particle.
(b) It changes depending on the particle's energy.
(c) It increases with each interaction with a particle of greater spin.
(d) It depends on the strength of the local magnetic field.

4. Which of the following is true about the background microwave radiation of the universe?
(a) It varies across the universe, and is no more than 12 degrees Kelvin anywhere.
(b) It is almost uniform, and no more than 0.2 degrees Kelvin anywhere.
(c) It is almost uniform, about 2.7 degrees Kelvin on average.
(d) It varies across the universe, and is no more than 2.7 degrees Kelvin anywhere.

5. According to string theory, what is the fabric of space-time made of?
(a) The coherent state of strings.
(b) It does not really exist.
(c) An enormous three-brane.
(d) Calabi-Yau spaces.

Short Answer Questions

1. According to Greene, what is the underlying principle of general relativity?

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

3. What problem of cosmology was the inflationary model created to deal with?

4. In ratios of what number do winding energies come?

5. According to the standard model of the big bang, which of the following is true of the four fundamental forces during the first moments of the universe?

(see the answer key)

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