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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 type of storage does RAM offer?

2. The speed of the vibration affects ____________.

3. What two elements combine to make a body scanner?

4. What type of input uses an analog-digital converter?

5. What does the acronym SONAR stand for?

Short Essay Questions

1. Discuss sound waves.

2. Discuss the two types of lens, concave and convex.

3. How is static electricity formed?

4. Who is the last mammoth?

5. What is current electricity? What is required to generate it?

6. Define the two types of waves that are discussed.

7. What makes it possible to use waves to communicate? How is this done?

8. What are the effects of electrons on the move?

9. How do some frequencies of electromagnetic wavers appear to our eyes? Which waves can we not see?

10. Discuss the composition of light.

Essay Topics

Write an essay for ONE of the following topics:

Essay Topic 1

Discuss the following:

1) Define the term vacuum.

2) How does a thermos use the principle of a vacuum to keep things hot or cold? Why does a thermos ultimately lose its heat or cold?

3) What is combustion and how is it explained at the molecular level?

4) How do combustion machines take advantage of the principle of combustion?

5) Explain how explosives work and what components must be present in an explosive.

Essay Topic 2

Discuss the following:

1) Define the property of precession. How is precession related to wheels. How does precession help a rolling wheel stay upright? How does the rotating speed of a wheel affect precession?

2) What is inertia? How is it related to wheels? How does the weight of an object affect inertia? What does inertia resist? How does this resistance affect the movement of a wheel?

3) What is centrifugal force? How is the property of centrifugal force important ina clothes dryer?

Essay Topic 3

Discuss the following:

1) Describe the effect of heat upon molecules and give an example.

2) What are the three ways heat travels?

3) Define thermal radiation.

4) Define conduction and give at least one example of it.

5) Define convection and give at least one example of it.

6) Discuss the rays which the sun emits. What happens when the rays reach an object?

(see the answer keys)

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