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This test consists of 5 multiple choice questions, 5 short answer questions, and 10 short essay questions.

## Multiple Choice Questions

**1. What does much of the possibility of time travel depend on?**
**(a)** Finding contemporary spaces of positive energy. **(b)** Finding local spaces of negative energy. **(c)** Finding contemporary spaces of negative energy. **(d)** Finding infinite spaces of negative energy.

**2. What can Penrose and Hawking's machinery help them study?**
**(a)** Solar belts and singularities. **(b)** Planetary rings and asteroids. **(c)** Black holes and the middle of the earth. **(d)** Singularities and black holes.

**3. What do the Schrodinger equations assume?**
**(a)** That speed is a constant. **(b)** That force is a product of gravity. **(c)** That motion is inverse to acceleration. **(d)** That time runs smoothly everywhere.

**4. What does the Schrodinger equation specify?**
**(a)** The rate at which satellites operate particle states. **(b)** The rate at which bell curves change with motion. **(c)** The rate at which light function changes with speed. **(d)** The rate at which wave function changes with time.

**5. What may computers also have like human brains?**
**(a)** Multiple dimensions. **(b)** Multiple energies. **(c)** Computational processing. **(d)** Parallel processing.

## Short Answer Questions

**1.** How could time travel be possible?

**2.** What does Hawking say extraterrestrials might be like?

**3.** How many books a year are estimated to be published?

**4.** How could this energy density be created?

**5.** How can one find black holes?

## Short Essay Questions

**1.** What might happen if we do not destroy ourselves?

**2.** What are three of the things Hawking declares have increased exponentially, doubling every forty years of less?

**3.** What is a time travel "horizon"?

**4.** What did Strominger and Vafa postulate in 1996?

**5.** How does Hawking begin Chapter Four?

**6.** What did the physicist John Wheeler mean when he said, "a black hole has no hair"?

**7.** What will happen as brains increase in size?

**8.** What does it mean for Hawking to think one can "move" positive vacuum energy?

**9.** What does Hawking think he can prove about space-time paths?

**10.** At what rate is the computational power of computers increasing, and what computational rate might they actually reach?

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