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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 is an object's weight divided by its volume?
(a) An object's elemental number.
(b) The object's ability to exert force.
(c) An object's density.
(d) The object's constant mass.

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

3. Upon how many major principles do propellers and rudders work?
(a) Four.
(b) Two.
(c) Three.
(d) One.

4. What is a first-class lever?
(a) Where the effort is a greater distance from the fulcrum than the load.
(b) Where the distance is further from the fulcrum than the effort.
(c) Where there is no load needed for the effort.
(d) Where the effort and the load are equal distances from the fulcrum.

5. What is the density of salt water compared to fresh water?
(a) Salt water is denser.
(b) It depends on their electrical charge.
(c) Fresh water is denser.
(d) They have the same density.

Short Answer Questions

1. What are large fins which adjust their tilt to compensate for waves?

2. What happens when you exert your strength across a longer distance?

3. What is the effort you put in combined with the distance over which the effort is done?

4. What is another type of wedge the author mentions?

5. What is the main idea in Part 2 of the book?

Short Essay Questions

1. How can electric heat keep things cold?

2. What is the main focus of the first section of Part 2, Harnessing the Elements?

3. Discuss how sails are used on a boat.

4. Discuss the relation of effort to distance.

5. What is a vacuum? What is one invention that uses this principle?

6. How do heating elements work?

7. Discuss fulcrum points as pertaining to levers.

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

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

10. How does a zipper work?

(see the answer keys)

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