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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. Why does a thermos lose heat?
(a) The molecules eventually slow down.
(b) The argon absorbs the heat.
(c) The oxygen absorbs the heat.
(d) The heat can travel through the stopper.

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

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

4. What principle does a thermostat use?
(a) The principle of entropy.
(b) The principle that heat causes expansion.
(c) The law of electronic fission.
(d) The third principle of thermonectics.

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

Short Answer Questions

1. What causes sideways movements of a ship?

2. What principle is in use as a propeller pushes the water back and as that same water which has been pushed back rolls forward again and hits the propeller?

3. What is the term for the process of molecules moving further apart in convection?

4. How does a rocket engine power the craft?

5. What is a fulcrum?

(see the answer key)

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