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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 are two things a sail can do for a craft?
2. What is the principle behind the action of any machine?
3. What is an example of a second-class lever?
4. How does a zipper operate?
5. What turns the crankshaft in an internal combustion engine?
Short Essay Questions
1. How do the rotor blades on a helicopter work?
2. What rays does the sun emit? How do those rays react to an object?
3. Discuss fulcrum points as pertaining to levers.
4. Discuss the four types of gears.
5. What is the most common form of inclined plane in machines? How does it work?
6. What is a vacuum? What is one invention that uses this principle?
7. Discuss why the density of water varies.
8. What is an internal combustion engine? Cite several examples of such engines.
9. Explain thermal radiation.
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) Define elements, atoms, and molecules.
2) What are the properties of molecules that are important in the way many tools and machines work? Explain the properties and give an example of each property at work in a tool or machine.
3) How is floating related to the physical properties of molecules? What does density have to do with whether something will float? Does one have to take into account more than one density when calculating if something will float? Why or why not?
4) Why do you think a ball of steel that is three inches in diameter sinks, but a steel ship will float? Explain your answer.
Essay Topic 2
Discuss the following:
1) Define the Principle of Action and Reaction and the Principle of Suction.
2) How is the Principle of Action and Reaction related to a propeller? Explain with examples.
3) How is the principle of suction related to propellers? Explain with examples.
4) How does a sailboat use the principle of suction? How does a sailboat with two triangular sails differ from a sailboat with only one triangular sail with regards to the principle of suction?
5) Do you think the principle of suction applies to using a straw to drink? Explain your response.
Essay Topic 3
Discuss the following:
1) How does Macaulay use the term wheel and axle?
2) How is the wheel and axle related to a screwdriver? To the Hand Drill? A wrench?
3) Do you think the wheel and axle discussed in The New Way Things Work is an important invention? Why or why not.
4) Research the history of the screwdriver. When was it invented? By whom? Where? How were the first screwdrivers made? How are they made today?
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This section contains 1,061 words (approx. 4 pages at 300 words per page) |
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