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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 principle is in use as a propeller pushes the water back and as that same water which has been pushed back rolls forward again and hits the propeller?
(a) The Principle of Gravity.
(b) The Principle of Push and Thrust.
(c) The Principle of Action and Reaction.
(d) The Principle of Force and Inertia.

2. How does a zipper operate?
(a) Just using triangular wedges.
(b) It is not a wedge system, but rather a rolling arc system.
(c) Just lower curved wedges.
(d) The use of triangular wedges and lower curved wedges.

3. What pumps refrigerant out in an air conditioner?
(a) A gear.
(b) A solenoid.
(c) A compressor.
(d) Oscillator.

4. What is the principle behind the action of any machine?
(a) The conservation of energy.
(b) The type of energy it takes to make the machine work.
(c) The amount of energy it expends.
(d) The amount of energy it saves.

5. What causes expansion?
(a) Gravity.
(b) Inertia.
(c) Heat.
(d) Cold.

Short Answer Questions

1. What does one have to understand in order to understand the way things work?

2. What does the picture of a mammoth pulling a merry-go-round illustrate?

3. How many types of gears are there?

4. What occurs when molecules begin vibrating in a solid, then speed up their vibration when heated?

5. What is one type of ray that human eyes cannot perceive?

(see the answer key)

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