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This test consists of 5 multiple choice questions, 5 short answer questions, and 10 short essay questions.

Multiple Choice Questions

1. What does the Mechanics of Movement explore?
(a) How pulleys can create energy.
(b) How the movement of anything can be either a net gain or net loss of energy.
(c) How the conservation of energy plays into movement, force, and effort.
(d) How pulleys ultimately lose energy that can never be regained.

2. What is one example the author uses of a wedge?
(a) A type of door stop.
(b) A ship's ramp.
(c) A block and tackle system.
(d) An escalator.

3. Where is steam still used?
(a) In thermal power stations.
(b) In water plants.
(c) In some internal combustion engines.
(d) In industrial engines.

4. What do the double walls of a thermos enclose?
(a) A vacuum.
(b) Nitrogen.
(c) Oxygen.
(d) Argon.

5. Upon what does the amount of upthrust of an object in water depend?
(a) On what the water's electrical charge is.
(b) On what the object's salinity is.
(c) On whether or not the object is greater than one centimeter in diameter.
(d) On how much water the object displaces.

Short Answer Questions

1. What happens if the force of upthrust is equal to the weight of an object in water?

2. What are tanks that take in water to increase the density of the craft?

3. In how many elements did the Greek believe?

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

5. What are small propellers mounted in the base of a ship's hull?

Short Essay Questions

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

2. Define combustion. How is combustion used?

3. Discuss the concept of floating.

4. Discuss why the density of water varies.

5. How does a zipper work?

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

7. What does the principle of the conservation of energy state? How does Part 1 relate to that principle?

8. What determines if an object will float?

9. What is an internal combustion engine? Cite several examples of such engines.

10. How does the atom bomb work?

(see the answer keys)

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