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This quiz consists of 5 multiple choice and 5 short answer questions through Part 3, Working with Waves.

Multiple Choice Questions

1. What is another type of wedge the author mentions?
(a) The inversion ring.
(b) The gate latch.
(c) The caliper.
(d) The sharp tapered edge of axes.

2. Why can a dog hear a dog whistle that humans cannot?
(a) They have been trained to listen to that particular frequency.
(b) Their eardrums are larger.
(c) They can isolate a sound better than humans.
(d) They can hear sound waves at a greater range of frequencies.

3. In how many elements did the Greek believe?
(a) Three.
(b) Four.
(c) Seven.
(d) Eight.

4. What urges do molecules possess?
(a) Only the urge to spread apart.
(b) None.
(c) The urge to huddle together or spread apart.
(d) Only the urge to huddle together.

5. What contains one element which is the detonator and another reactive element which acts as the propellant?
(a) Explosives.
(b) Oscillators.
(c) Engines.
(d) Propellants.

Short Answer Questions

1. What happens when molecules are squeezed or stretched beyond the boundaries of their comfortable balance?

2. Upon what principle does a pulley work?

3. Why is cold water denser than warm water?

4. What debris does a nuclear explosion create?

5. Why does a thermos lose heat?

(see the answer key)

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