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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 one component of a lever?
(a) A spring.
(b) A straight edge.
(c) A screw.
(d) A caliper.

2. Why is cold water denser than warm water?
(a) Warm water's molecules move around more loosely.
(b) Cold water has a greater ability to coalesce.
(c) Cold water's molecules move around more loosely.
(d) Warm water has a greater ability to absorb force.

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

4. What does the picture of a mammoth pulling a merry-go-round illustrate?
(a) Gears and belts.
(b) Levers.
(c) Wedges.
(d) Blocks and tackles.

5. Through what can heat not travel?
(a) A vacuum.
(b) There is nothing through which heat cannot travel.
(c) Very dense elements.
(d) Very porous elements.

Short Answer Questions

1. How does floating harness the power obtained by squeezing or stretching molecules?

2. What does the inclined plane do?

3. What is the principle behind the action of any machine?

4. How many ways can heat travel?

5. Upon what principle does a pulley work?

Short Essay Questions

1. How does the atom bomb work?

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

3. How does a ship use plimsoll lines?

4. What determines if an object will float?

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

6. Discuss how sails are used on a boat.

7. How do the rotor blades on a helicopter work?

8. Describe how a door wedge works.

9. Discuss the four types of gears.

10. Explain thermal radiation.

(see the answer keys)

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