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This test consists of 15 multiple choice questions and 5 short answer questions.

Multiple Choice Questions

1. By what factor is the minimum mass of a wrapped string in determined?
(a) The string's winding number.
(b) The vacuum energy of the dimension it is wrapped around.
(c) The string's Planck tension.
(d) The size of the circular dimension it is wrapped around.

2. What type of a string can be massless?
(a) An unwrapped string.
(b) A non-vibrating.
(c) A string with more than one dimension.
(d) A non-oscillating string.

3. What is a string's winding number?
(a) The number of dimensions it vibrations through.
(b) The ratio of its Planck tension to its tension at rest.
(c) The number of other strings it is threaded with.
(d) The number of times it is wrapped around a circular dimension.

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

5. The number of family groups corresponds to a feature of the Calabi-Yau shape. What is this feature?
(a) Its number of folds.
(b) Its number of holes.
(c) Its degree of internal divisions.
(d) Its number of extended dimensions.

6. Which of the following is one of the difficulties in observing super particles?
(a) They are massless.
(b) They are incredibly rare, and pass through most matter.
(c) They are too massive to be observed in a particle accelerator.
(d) They do not interact with either matter or light.

7. 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?
(a) It makes up about half the mass needed.
(b) It makes up a very small percentage of the mass needed.
(c) There is much more of it than is needed to cause collapse.
(d) It almost exactly equals the mass needed.

8. How many total dimensions are required by string theory?
(a) Ten.
(b) Five.
(c) Eight.
(d) Seven.

9. How does the shape of the extra "curled up" dimensions affect the vibration of strings?
(a) Only the wavelength of the vibration is affected.
(b) Only the total energy of the vibration is affected.
(c) The shape determines what types of vibrations are possible.
(d) The shape does not affect the vibrational patterns.

10. What is entropy a measure of?
(a) Energy lost over time.
(b) The energy lost by a black hole.
(c) Heat and pressure.
(d) Disorder.

11. Which of the following is NOT a property that is used to define both black holes and elementary particles?
(a) Mass.
(b) Half-life.
(c) Force charge.
(d) Spin.

12. Riemannian geometry describes the following objects: _____.
(a) N-dimensional spheres.
(b) Finite, unbounded spaces.
(c) Six-dimensional manifolds.
(d) Curved spaces.

13. What is the scientific state of the "multiverse" theory?
(a) It is well accepted by the physics community.
(b) It is on the fringes of physics.
(c) It was discarded years ago.
(d) It is accepted by almost all young physicists, but almost no older ones.

14. Why are the extra dimensions needed in string theory?
(a) To account for the infinite-energy problem.
(b) To provide more space for strings.
(c) To remove time from its equations.
(d) To prevent the negative and infinite answers to its physical equations.

15. Which of the following methods has been used to determine the shape of the Calabi-Yau space?
(a) The finite elements method.
(b) Matrix manipulation.
(c) Perturbation theory.
(d) Discrete mathematics.

Short Answer Questions

1. Tears in space-time are technically termed _____.

2. The horizon problem is the contradiction that which of the following properties of the universe shouldn't be uniform, but is?

3. Which of the following is true regarding tears in space time occurring in normal three-dimensional space?

4. 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?

5. Which of the following best describes the fate of Kaluza-Klein theory?

(see the answer keys)

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