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This quiz consists of 5 multiple choice and 5 short answer questions through Chapter 5, The Need for a New Theory, General Relativity vs. Quantum Mechanics.

Multiple Choice Questions

1. What type of motion cannot be felt or sensed by the moving observer?
(a) Accelerating movement.
(b) Slowing or decelerating movement.
(c) Constant-velocity movement.
(d) Orbital movement around a star.

2. How can black holes be detected?
(a) With an ultraviolet-range telescope.
(b) By observing the directions of solar winds.
(c) By their effects on objects around them.
(d) By looking for dark gaps in clusters of stars.

3. The smallest possible unit of energy is referred to as _____.
(a) A quark.
(b) A muon.
(c) A quantum.
(d) A photon.

4. Which of the following correctly describes the structure of an atom?
(a) A cloud of protons, each with an electron orbiting it.
(b) A single nucleus composed of both electrons and protons.
(c) A cloud of neutrons orbiting a nucleus of other particles.
(d) A cloud of electrons orbiting a dense nucleus.

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

Short Answer Questions

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

2. General relativity is incompatible with _____.

3. Quantum chromodynamics concerns quantum mechanics and ____.

4. Black holes are dense and massive cosmological bodies. What unique distinction do they have?

5. The wave-like nature of the electron means that after a collision, _____.

(see the answer key)

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