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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. How does a wedge move an object up an inclined plane?
(a) It forces the object to reduce the effects of gravity.
(b) It uses the effect of gravity.
(c) It lowers the plane so the object slides.
(d) It doesn't ; the wedge moves the plane itself to raise an object.

2. What additional tasks can a boat with two triangular sails do?
(a) Achieve two additional suction forces.
(b) Divide the suction force.
(c) Achieve one additional suction force.
(d) Multiply the suction force by three.

3. What controls direction on a ship?
(a) A drive.
(b) A valve.
(c) A screw.
(d) A rudder.

4. How many types of gears are there?
(a) Seven.
(b) Five.
(c) One.
(d) Four.

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

Short Answer Questions

1. What is one example the author uses of a wedge?

2. What imparts movement into the air or water around them on a ship?

3. What forms a molecule?

4. What is the resistance of an object to any change in its speed or direction?

5. What causes sideways movements of a ship?

(see the answer key)

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