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This quiz consists of 5 multiple choice and 5 short answer questions through Part 2, Harnassing the Elements, Introduction, Floating, Flying and Pressure Power, pp.91-141.

Multiple Choice Questions

1. What do you have to use in order to accomplish work with half the effort?
(a) Half the distance.
(b) One-third the distance.
(c) Twice the distance.
(d) Ten percent of the distance multiplied by one-third of the effort.

2. What happens when an object is placed in water?
(a) The water is repelled by the electrical force of the object.
(b) The object absorbs the water's atoms.
(c) The object sinks.
(d) The water molecules push against the object.

3. Upon how many major principles do propellers and rudders work?
(a) Two.
(b) Three.
(c) One.
(d) Four.

4. How many forces hold things together?
(a) One.
(b) Two.
(c) Four.
(d) Three.

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

Short Answer Questions

1. What does the inclined plane do?

2. What is an example of a second-class lever?

3. What are tanks that take in water to increase the density of the craft?

4. Why is cold water denser than warm water?

5. How does a ship vary in density?

(see the answer key)

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