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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. How many forces hold things together?
(a) Two.
(b) Three.
(c) Four.
(d) One.

2. What happens when you exert your strength across a longer distance?
(a) Nothing happens. It is all balanced by the decreased work required.
(b) Your effort is reduced, and your lesser strength becomes sufficient.
(c) Your effort is reduced so you can take advantage of your greater strength.
(d) Your effort is reduced, but your strength has to be increased.

3. How is magnetism created?
(a) By rubbing together zinc tablets.
(b) By moving electrons.
(c) By all negative electrons.
(d) By all positive electrons.

4. What causes expansion?
(a) Cold.
(b) Heat.
(c) Inertia.
(d) Gravity.

5. Of what is color photography paper made when printing from a negative?
(a) Three color sensitive layers.
(b) Six color sensitive layers.
(c) A black layer sandwhiched between two color sensitive layers.
(d) One color sensitive layers.

Short Answer Questions

1. In what part of the atom does one find electrons?

2. What does a driving force initiate?

3. What do machines that keep something cool do to heat?

4. What is the distance between each peak of energy in a wave?

5. What is the principle behind the action of any machine?

(see the answer key)

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