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

2. According to Newton's law of gravity, the strength of the pull between two objects depends on what factors?
(a) Their masses and the distance between them.
(b) The distance between them and their average atomic numbers.
(c) Their densities and the strength of the gravitational field they occupy.
(d) Their masses and potential energies.

3. What is the fundamental particle, the smallest possible bundle of energy, for the electromagnetic force?
(a) The neutrino.
(b) The photon.
(c) The gluon.
(d) The electron.

4. 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 lighter objects.
(c) Near the speed of light, faster for more massive objects.
(d) At exactly the speed of light.

5. In 1968 it was discovered that protons and neutrons are composed of which type of particle?
(a) Muons.
(b) Baryons.
(c) Neutrinos.
(d) Quarks.

Short Answer Questions

1. What is the shape of all particles, at the smallest possible level, according to string theory?

2. When the distance between two objects is doubled, what happens to the strength of the gravitational pull between them?

3. General relativity is incompatible with _____.

4. Which of the following is not one of the four fundamental forces of the universe?

5. Two theories form the basis of modern physics, but are incompatible with one another. String theory attempts to reconcile these fields. What are these two theories?

(see the answer key)

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