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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 does the inclined plane do?
(a) Increases effort.
(b) Decreases gravitational force.
(c) Decreases effort.
(d) Extends the distance to a rise.

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

3. How does floating harness the power obtained by squeezing or stretching molecules?
(a) By squeezing an atom to split the proton and neutron.
(b) By gathering the individual electrons that are released.
(c) Through the form of upthrust.
(d) By energy "floating" through atomic fields and breaking the bonds to release energy.

4. What are two things a sail can do for a craft?
(a) Propel and repel.
(b) Give pulpulsion and direction.
(c) Propel and stop.
(d) Lift and Slow.

5. What is a substance that contains only one type of atom?
(a) A quantum.
(b) A molecule.
(c) A cell.
(d) An element.

Short Answer Questions

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

2. How does a ship vary in density?

3. What is the formula for work done?

4. What is the effort you put in combined with the distance over which the effort is done?

5. What forms a molecule?

(see the answer key)

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