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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 is the formula for work done?
(a) Effort multiplied by distance.
(b) Distance plus effort.
(c) Distance divided by strength.
(d) Effort times gravitational force.

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

3. What are small propellers mounted in the base of a ship's hull?
(a) Stablizers.
(b) Thrusters.
(c) Rudders.
(d) Tillers.

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

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

Short Answer Questions

1. The rack and pinion is an example of ______________.

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

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

4. What is applied to a lever to make it move?

5. What is the most common form of inclined plane found in machines?

(see the answer key)

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