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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. 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 water's electrical charge is.
(c) On what the object's salinity is.
(d) On how much water the object displaces.
2. In flying, what is used to overcome weight from gravity?
(a) Lift created by the tiller.
(b) Lift created by the airfoil.
(c) Lift created by the nose.
(d) Lift created by the rudder.
3. What is the density of salt water compared to fresh water?
(a) Salt water is denser.
(b) They have the same density.
(c) Fresh water is denser.
(d) It depends on their electrical charge.
4. Why is cold water denser than warm water?
(a) Cold water has a greater ability to coalesce.
(b) Warm water's molecules move around more loosely.
(c) Warm water has a greater ability to absorb force.
(d) Cold water's molecules move around more loosely.
5. What forms a molecule?
(a) One or more atoms.
(b) Five or more atoms.
(c) Six or less atoms.
(d) Two or more atoms.
Short Answer Questions
1. What are two things a sail can do for a craft?
2. What does a driving force initiate?
3. Upon how many major principles do propellers and rudders work?
4. What is a substance that contains only one type of atom?
5. What is the resistance of an object to any change in its speed or direction?
This section contains 252 words
(approx. 1 page at 300 words per page)