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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 an example of a second-class lever?
(a) A clock.
(b) A nutcracker.
(c) A crane.
(d) An engine block system.

2. What is the resistance of an object to any change in its speed or direction?
(a) Gravity.
(b) Lift.
(c) Inertia.
(d) Propulsion.

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

4. What is an object's weight divided by its volume?
(a) The object's ability to exert force.
(b) The object's constant mass.
(c) An object's elemental number.
(d) An object's density.

5. Upon what does the amount of upthrust of an object in water depend?
(a) On whether or not the object is greater than one centimeter in diameter.
(b) On what the object's salinity is.
(c) On what the water's electrical charge is.
(d) On how much water the object displaces.

Short Answer Questions

1. What is another type of wedge the author mentions?

2. Upon what principle does a pulley work?

3. How does a zipper operate?

4. What does the inclined plane do?

5. What causes sideways movements of a ship?

(see the answer key)

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