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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 does the picture of a mammoth pulling a merry-go-round illustrate?
(a) Gears and belts.
(b) Levers.
(c) Wedges.
(d) Blocks and tackles.

2. What causes sideways movements of a ship?
(a) Rods.
(b) Jone's principle.
(c) Thrusters and stabilizers.
(d) Cams.

3. What is one example the author uses of a wedge?
(a) An escalator.
(b) A type of door stop.
(c) A ship's ramp.
(d) A block and tackle system.

4. What additional tasks can a boat with two triangular sails do?
(a) Multiply the suction force by three.
(b) Achieve one additional suction force.
(c) Divide the suction force.
(d) Achieve two additional suction forces.

5. What is the principle that states energy is neither created nor destroyed?
(a) The principle of the conservation of energy.
(b) The principle of energy gain.
(c) The principle of energy change.
(d) The principle of energy loss.

Short Answer Questions

1. What is an object's weight divided by its volume?

2. What do the double walls of a thermos enclose?

3. What urges do molecules possess?

4. What controls the movement in a gear system?

5. Why is cold water denser than warm water?

(see the answer key)

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