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This quiz consists of 5 multiple choice and 5 short answer questions through Part 2, Harnassing the Elements, Exploiting Heat, Nuclear Power, pp. 142-173.

Multiple Choice Questions

1. What are small propellers mounted in the base of a ship's hull?
(a) Stablizers.
(b) Thrusters.
(c) Tillers.
(d) Rudders.

2. What happens when you exert your strength across a longer distance?
(a) Your effort is reduced, and your lesser strength becomes sufficient.
(b) Nothing happens. It is all balanced by the decreased work required.
(c) Your effort is reduced so you can take advantage of your greater strength.
(d) Your effort is reduced, but your strength has to be increased.

3. What forms a molecule?
(a) Five or more atoms.
(b) Six or less atoms.
(c) Two or more atoms.
(d) One or more atoms.

4. Where are wheels and axles found?
(a) Where a spoke and center come together.
(b) Wherever there is rotary motion.
(c) On all pulley systems.
(d) Just on cars and bikes.

5. What is convection?
(a) When heat increases velocity.
(b) Heat moving from a liquid or gas molecule to another.
(c) The way a molecule radiates heat.
(d) When heat causes wind.

Short Answer Questions

1. What is the result of a collision of molecules which break on impact forming new and different molecules?

2. What are large fins which adjust their tilt to compensate for waves?

3. What is a substance that contains only one type of atom?

4. What occurs when very small atoms smash together?

5. What do compound levers contain?

(see the answer key)

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