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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. How does a rocket engine power the craft?
(a) By the combustion of one propellant.
(b) By the combustion of two propellants.
(c) By the turning of a propeller.
(d) By nuclear fusion.

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

3. In flying, what is used to overcome weight from gravity?
(a) Lift created by the airfoil.
(b) Lift created by the nose.
(c) Lift created by the rudder.
(d) Lift created by the tiller.

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

5. What are different level marks for different types of water on the side of a ship called?
(a) Plimsoll lines.
(b) Flow marks.
(c) Anchor marks.
(d) Horizon marks.

Short Answer Questions

1. Upon what does the amount of upthrust of an object in water depend?

2. What does one have to understand in order to understand the way things work?

3. What happens when molecules are squeezed or stretched beyond the boundaries of their comfortable balance?

4. How does heat travel through heating elements?

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

(see the answer key)

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