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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 are tanks that take in water to increase the density of the craft?
(a) Rolling.
(b) Bilge.
(c) Ballast.
(d) Variable.

2. What does increasing heat do to molecules?
(a) It slows them down.
(b) Nothing.
(c) It increases the movement of molecules.
(d) It makes them break apart.

3. What emits both infrared and light rays?
(a) The moon.
(b) A light bulb.
(c) The sun.
(d) A planet.

4. What is the transfer of heat through infrared rays?
(a) Convection.
(b) Transmigration.
(c) Thermal radiation.
(d) Heat cannot transfer through infrared rays.

5. When an object absorbs light rays, how is the energy held in the object?
(a) As heat.
(b) As kinetic energy.
(c) There is no energy involved.
(d) As inertial energy.

Short Answer Questions

1. What causes sideways movements of a ship?

2. What are different level marks for different types of water on the side of a ship called?

3. What is the result of a collision of molecules which break on impact forming new and different molecules?

4. What is one example the author uses of a wedge?

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

Short Essay Questions

1. How does the inclined plane require less strength for a task?

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

3. Discuss why the density of water varies.

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

5. How do heating elements work?

6. Explain thermal radiation.

7. How can electric heat keep things cold?

8. Discuss fulcrum points as pertaining to levers.

9. How does a zipper work?

10. How does the atom bomb work?

(see the answer keys)

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