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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 does increasing heat do to molecules?
2. What does the inclined plane do?
3. What does the picture of a mammoth pulling a merry-go-round illustrate?
4. What is the principle behind the action of any machine?
5. How does a rocket engine power the craft?
Short Essay Questions
1. Define the two elements that explosives must contain.
2. Discuss what happens when a driving force initiates movement.
3. Discuss the two principles upon which propellers and rudders work in a boat.
4. Discuss fulcrum points as pertaining to levers.
5. How do the rotor blades on a helicopter work?
6. Explain thermal radiation.
7. Discuss why the density of water varies.
8. How does a zipper work?
9. What is the most common form of inclined plane in machines? How does it work?
10. What determines if an object will float?
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
1) Fully explain the principle(s) upon which the lever works.
2) Archimedes is credited with saying, "Give me a place to stand on, and I will move the Earth." This statement was made in reference to his work with levers. Discuss fully, based upon your understanding of levers in The New Way Things Work, what you think Archimedes means.
3) Research the history of levers and write an informative essay about what you have learned. Include a discussion of the way three different levers work.
Essay Topic 3
One of the greatest impacts upon modern society is the invention of the internal combustion engine. Discuss the following:
1) What is an internal combustion engine?
2) Compare an engine that uses gas to one that is used in a jet.
3) Do you think the overall impact of the internal combustion engine in the modern world has been positive or negative? Explain your answer.
4) What engine preceded the internal combustion engine and what did this engine precipitate? Explain how this engine works.
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This section contains 1,032 words (approx. 4 pages at 300 words per page) |
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