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This quiz consists of 5 multiple choice and 5 short answer questions through Chapter 3, Of Warps and Ripples.

Multiple Choice Questions

1. According to Einstein's theory of general relativity, if two objects have a gravitational pull on one another, and one changes its mass or distance from the other, how quickly does the effect of this change travel to the other object?
(a) Instantaneously.
(b) Near the speed of light, faster for more massive objects.
(c) At exactly the speed of light.
(d) Near the speed of light, faster for lighter objects.

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

3. Which of the following is not true according to special relativity?
(a) No object can move faster than the speed of light.
(b) Motion and time are relative; they depend on the observer.
(c) All objects move at a constant speed through space-time.
(d) Time does not pass for objects that are perfectly at rest.

4. Which of the following is a correct statement, based on the theory of special relativity?
(a) Energy only exists relative to mass.
(b) Time and space are not experienced exactly the same by all observers
(c) Time is always the same to all observers, but space is not.
(d) Movement can only be measured relative to very massive objects, such as stars.

5. What is different about a particle of antimatter, compared to its normal counterpart?
(a) Complementary spin.
(b) Zero mass.
(c) Opposite electrical charge.
(d) Negative mass.

Short Answer Questions

1. In 1968 it was discovered that protons and neutrons are composed of which type of particle?

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

3. According to special relativity, which of the following can move faster than light?

4. According to general relativity, which of the following is said to warp or bend space-time?

5. Which of the following is correct about the speed at which light moves?

(see the answer key)

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