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

Multiple Choice Questions

1. What is one possible way that the three dimensions we observe could have been "stretched out"?
(a) The big bang.
(b) A false vacuum event.
(c) Vacuum energy.
(d) Quantum fluctuations.

2. What property of both black holes and elementary particles is still unknown?
(a) Their supersymmetric partners.
(b) Their internal structures.
(c) Their spin.
(d) Their relationships to strings.

3. At what scale of length is quantum geometry necessitated?
(a) The Riemann scale.
(b) Cosmological scales.
(c) The Planck length.
(d) Nanometers.

4. In ratios of what number do winding energies come?
(a) Ten.
(b) Two.
(c) Any whole number.
(d) Six.

5. What is the importance of the string-coupling constant?
(a) It could invalidate the perturbation method.
(b) It is crucial in estimating the amount of dark energy in the universe.
(c) If discovered, it could validate string theory as a whole.
(d) It determines the energy released during a string's collapse.

6. Regarding mirror-symmetry, Greene's work proved that _____.
(a) It occurs only below the Planck length.
(b) It is only valid under special circumstances.
(c) It is invalid.
(d) It is a part of string theory.

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

8. Which of the following is true regarding experimental evidence for super particles?
(a) They have been observed for a long time, and have only recently been identified.
(b) They have not been observed.
(c) They cannot be observed experimentally.
(d) They have been observed in multiple experiments.

9. In string theory, how do strings interact?
(a) By colliding and tangling.
(b) By joining and splitting.
(c) By resonating with each other.
(d) By threading.

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

11. Which of the following is true regarding the force of gravity in string theory?
(a) String theory predicts gravity.
(b) Gravity is not addressed in string theory.
(c) Gravity in string theory is stronger than what we actually observe.
(d) Gravity in string theory acts over much longer distances.

12. Which of the following is true regarding the tearing of space-time according to string theory?
(a) It is not known if space-time can tear.
(b) It cannot tear.
(c) A tear would destroy the universe.
(d) It can tear under special circumstances.

13. In M-theory, what role does duality play?
(a) It helps to incorporate general relativity.
(b) It links electromagnetism and gravity.
(c) It allows space-tearing flop transitions to extend into extra dimensions.
(d) It shows that the five theories are connected.

14. About how old is the universe?
(a) 950 billion years.
(b) 14 billion years.
(c) Two billion years.
(d) 300 billion years.

15. Which of the following most accurately describes the state of the universe?
(a) It is collapsing.
(b) It is about to begin contracting.
(c) It is expanding.
(d) It is mostly static.

Short Answer Questions

1. Who provided the computer programming to process the results of the Morrison-Greene experiment?

2. 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?

3. What is the collapse and reformation of a Calabi-Yau shape called?

4. How does the number of extra "curled up" dimensions affect the vibration of strings?

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

(see the answer keys)

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