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

2. What happens when molecules are squeezed or stretched beyond the boundaries of their comfortable balance?
(a) The molecules are driven to return to that balance.
(b) The molecules are driven to remain unbalanced.
(c) The molecules dissipate into individual atoms that can be lost or destroyed.
(d) They remain in an uneasy balance.

3. How does a zipper operate?
(a) Just using triangular wedges.
(b) Just lower curved wedges.
(c) The use of triangular wedges and lower curved wedges.
(d) It is not a wedge system, but rather a rolling arc system.

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

5. What are two things a sail can do for a craft?
(a) Propel and repel.
(b) Give pulpulsion and direction.
(c) Lift and Slow.
(d) Propel and stop.

Short Answer Questions

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

2. What is a first-class lever?

3. In flying, what is used to overcome weight from gravity?

4. Upon how many major principles do propellers and rudders work?

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

(see the answer key)

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