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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 applied to a lever to make it move?
(a) Balance.
(b) Gravitational pull.
(c) Force.
(d) Work.

2. What is another type of wedge the author mentions?
(a) The sharp tapered edge of axes.
(b) The inversion ring.
(c) The gate latch.
(d) The caliper.

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

4. 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 how much water the object displaces.
(c) On what the water's electrical charge is.
(d) On what the object's salinity is.

5. What is a first-class lever?
(a) Where the distance is further from the fulcrum than the effort.
(b) Where the effort is a greater distance from the fulcrum than the load.
(c) Where the effort and the load are equal distances from the fulcrum.
(d) Where there is no load needed for the effort.

Short Answer Questions

1. How does a wedge move an object up an inclined plane?

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

3. What do you have to use in order to accomplish work with half the effort?

4. What are different level marks for different types of water on the side of a ship called?

5. How does floating harness the power obtained by squeezing or stretching molecules?

(see the answer key)

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