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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 controls the movement in a gear system?
(a) The size of the gear.
(b) The size of the belt.
(c) The rotation of the gear.
(d) The inertia needed to be overcome.

2. What is the transfer of heat through infrared rays?
(a) Thermal radiation.
(b) Convection.
(c) Heat cannot transfer through infrared rays.
(d) Transmigration.

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

4. What is the factor which determines an object's ability to float?
(a) Density.
(b) Inertia.
(c) Force.
(d) Volume.

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

Short Answer Questions

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

2. What happens when an object is placed in water?

3. What causes expansion?

4. What is an absence of substance?

5. Where are wheels and axles found?

(see the answer key)

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