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

2. What imparts movement into the air or water around them on a ship?
(a) Cams.
(b) Bits.
(c) Levers.
(d) Propellers.

3. In flying, what is used to overcome weight from gravity?
(a) Lift created by the nose.
(b) Lift created by the airfoil.
(c) Lift created by the rudder.
(d) Lift created by the tiller.

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

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

Short Answer Questions

1. In how many elements did the Greek believe?

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

3. What additional tasks can a boat with two triangular sails do?

4. What is a substance that contains only one type of atom?

5. What causes sideways movements of a ship?

(see the answer key)

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