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This test consists of 5 short answer questions, 10 short essay questions, and 1 (of 3) essay topics.

Short Answer Questions

1. What is the principle that states energy is neither created nor destroyed?

2. What pumps refrigerant out in an air conditioner?

3. What causes increased heat in the process of conduction?

4. Through what can heat not travel?

5. What controls the movement in a gear system?

Short Essay Questions

1. Define the two elements that explosives must contain.

2. How can electric heat keep things cold?

3. Discuss the two principles upon which propellers and rudders work in a boat.

4. What is the most common form of inclined plane in machines? How does it work?

5. How is nuclear power generated? What is one naturally occurring nuclear fusion?

6. How does a ship use plimsoll lines?

7. How do heating elements work?

8. What is an airfoil and how does it work?

9. Upon what law of physics are the simple machines that are introduced in Part 1 governed?

10. How do power crafts control their direction?

Essay Topics

Write an essay for ONE of the following topics:

Essay Topic 1

Discuss the following:

1) What is friction and where will you find friction?

2) Is friction ever useful? Explain your answer using examples from the book and your own experience.

3) How do engineers reduce friction? Do you think friction can be totally eliminated? Why or why not?

4) When in your own life do you think it would be important to understand about friction? Discuss with examples.

5) Research a disaster that has happened in human history that could be directly or indirectly attributed to the presence of friction. Write an essay summarizing the event.

Essay Topic 2

Discuss the following:

1) Define nuclear fission.

2) Define nuclear fusion.

3) Describe how nuclear power is produced inside a reactor.

4) What is a chain reaction and how is the principle of a chain reaction important in producing nuclear power?

5) How can the principle of a chain reaction be dangerous? Research and see if there have been any instances when a nuclear chain reaction was not controlled and the consequences of such an event.

Essay Topic 3

Discuss the following:

1) How do gears work? Why would you add a belt to a gear? Explain the different ways two gears can work.

2) What is the effect of speed on gears? What about size?

3) Define the four different types of gears and their purposes.

4) Research the history of gears. When were they invented? By whom? Where? How were the first gears made? How are they made today? What materials have they used to make gears in the past? In the present? Are gears still an important tool today?

(see the answer keys)

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