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

2. What is a first-class lever?
(a) Where the effort is a greater distance from the fulcrum than the load.
(b) Where the effort and the load are equal distances from the fulcrum.
(c) Where the distance is further from the fulcrum than the effort.
(d) Where there is no load needed for the effort.

3. The rack and pinion is an example of ______________.
(a) A stifle.
(b) A wedge.
(c) A lever.
(d) A gear.

4. What is the action of something burning?
(a) Radiation.
(b) Combustion.
(c) Convection.
(d) Molecular deceleration.

5. What is the formula for work done?
(a) Distance divided by strength.
(b) Effort times gravitational force.
(c) Distance plus effort.
(d) Effort multiplied by distance.

Short Answer Questions

1. What is a wheel and rod attacked by a hinge?

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

3. How many types of gears are there?

4. What controls direction on a ship?

5. What is the principle that states energy is neither created nor destroyed?

(see the answer key)

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