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This quiz consists of 5 multiple choice and 5 short answer questions through Part Four: Electricity and Automation.

Multiple Choice Questions

1. What is the factor which determines an object's ability to float?
(a) Density.
(b) Volume.
(c) Inertia.
(d) Force.

2. Why is cold water denser than warm water?
(a) Cold water has a greater ability to coalesce.
(b) Warm water has a greater ability to absorb force.
(c) Cold water's molecules move around more loosely.
(d) Warm water's molecules move around more loosely.

3. What is the density of salt water compared to fresh water?
(a) Salt water is denser.
(b) Fresh water is denser.
(c) They have the same density.
(d) It depends on their electrical charge.

4. In which direction do electrons always travel?
(a) From positive to negative.
(b) From true north to magnetic north.
(c) From negative to positive.
(d) From magnetic north to magnetic south.

5. Upon how many major principles do propellers and rudders work?
(a) Three.
(b) Two.
(c) One.
(d) Four.

Short Answer Questions

1. What is an object's weight divided by its volume?

2. What is the formula for work done?

3. What does the picture of a mammoth pulling a merry-go-round illustrate?

4. What is electricity flowing through a wire?

5. What turns the crankshaft in an internal combustion engine?

(see the answer key)

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