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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 a driving force initiate?
(a) Movement.
(b) Work.
(c) Electron activity.
(d) Inertia.

2. How does a ship vary in density?
(a) According to its load.
(b) According to how long it takes to get underway.
(c) According to how much water is on board.
(d) According to the speed it is making.

3. What are large fins which adjust their tilt to compensate for waves?
(a) Rotaries.
(b) Stabilizers.
(c) Fans.
(d) Screws.

4. What is suction referred to in the act of flying?
(a) Glide.
(b) Sinking.
(c) Lift.
(d) Floating.

5. What is the principle that states energy is neither created nor destroyed?
(a) The principle of the conservation of energy.
(b) The principle of energy loss.
(c) The principle of energy gain.
(d) The principle of energy change.

Short Answer Questions

1. Upon what does the amount of upthrust of an object in water depend?

2. What causes increased heat in the process of conduction?

3. What causes expansion?

4. What does the picture of a mammoth pulling a merry-go-round illustrate?

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

Short Essay Questions

1. Discuss why the density of water varies.

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

3. Discuss the two principles upon which propellers and rudders work in a boat.

4. What rays does the sun emit? How do those rays react to an object?

5. Discuss how sails are used on a boat.

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

7. Discuss the four types of gears.

8. How do power crafts control their direction?

9. Discuss the concept of floating.

10. How do heating elements work?

(see the answer keys)

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