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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 a wheel and rod attacked by a hinge?
(a) A prank.
(b) A worm.
(c) A crank.
(d) A spur.

2. Where can the electromagnetic fields exist that sound waves cannot?
(a) In the brain.
(b) In a vacuum.
(c) Through dense matter.
(d) Outside of matter.

3. What do sensors and detectors measure?
(a) Electrical currents, rays, and waves.
(b) Only electrical currents.
(c) Only electrical waves.
(d) Only light rays.

4. What is the absence of any light?
(a) Yellow.
(b) White.
(c) Purple.
(d) Black.

5. When a magnetic field flows from a magnet into metal what is pulled together?
(a) The metal and magnet.
(b) The magnet and the current.
(c) Nothing.
(d) The metal and the current.

Short Answer Questions

1. What does increasing heat do to molecules?

2. What is the density of salt water compared to fresh water?

3. Why is cold water denser than warm water?

4. How does Macaulay illustrate the idea of a chemical reaction to produce electricity?

5. What happens when molecules are squeezed or stretched beyond the boundaries of their comfortable balance?

(see the answer key)

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