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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 does one have to understand in order to understand the way things work?
(a) The underlying principle.
(b) The function of something.
(c) The terms of physics.
(d) The reason something is made.

2. What is the density of salt water compared to fresh water?
(a) Fresh water is denser.
(b) It depends on their electrical charge.
(c) They have the same density.
(d) Salt water is denser.

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

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

5. What are tanks that take in water to increase the density of the craft?
(a) Rolling.
(b) Ballast.
(c) Bilge.
(d) Variable.

Short Answer Questions

1. What are different level marks for different types of water on the side of a ship called?

2. How many forces hold things together?

3. What is the formula for work done?

4. How does floating harness the power obtained by squeezing or stretching molecules?

5. In how many elements did the Greek believe?

(see the answer key)

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