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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. Through what can heat not travel?
(a) A vacuum.
(b) Very porous elements.
(c) There is nothing through which heat cannot travel.
(d) Very dense elements.

2. What is convection?
(a) When heat causes wind.
(b) When heat increases velocity.
(c) The way a molecule radiates heat.
(d) Heat moving from a liquid or gas molecule to another.

3. What are two things a sail can do for a craft?
(a) Propel and repel.
(b) Give pulpulsion and direction.
(c) Propel and stop.
(d) Lift and Slow.

4. What makes waves different from molecules?
(a) Only their effects are different.
(b) Waves pass through matter.
(c) Waves are not actually real.
(d) Waves vibrate, but matter doesn't.

5. What is the formula for work done?
(a) Distance plus effort.
(b) Effort times gravitational force.
(c) Distance divided by strength.
(d) Effort multiplied by distance.

Short Answer Questions

1. What occurs when molecules begin vibrating in a solid, then speed up their vibration when heated?

2. What is a wheel and rod attacked by a hinge?

3. What is electricity flowing through a wire?

4. Why is cold water denser than warm water?

5. What is a substance that contains only one type of atom?

(see the answer key)

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