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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 an example of a second-class lever?
(a) A crane.
(b) An engine block system.
(c) A nutcracker.
(d) A clock.

2. Under what situation does the eye perceive a reflection of light?
(a) When the concave lens is distorted.
(b) When the retina has no rods or cones.
(c) When the convex lens is distorted.
(d) In looking at a solid.

3. What happens when an object is placed in water?
(a) The water is repelled by the electrical force of the object.
(b) The object sinks.
(c) The object absorbs the water's atoms.
(d) The water molecules push against the object.

4. What is electricity flowing through a wire?
(a) Watts.
(b) Current.
(c) Ohms.
(d) Resistance.

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

Short Answer Questions

1. What happens when you exert your strength across a longer distance?

2. The rack and pinion is an example of ______________.

3. What principle does a thermostat use?

4. What urges do molecules possess?

5. Where can the electromagnetic fields exist that sound waves cannot?

(see the answer key)

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