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

2. What is electricity flowing through a wire?
(a) Ohms.
(b) Watts.
(c) Resistance.
(d) Current.

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

4. What turns the crankshaft in an internal combustion engine?
(a) Steam.
(b) Gear.
(c) Pulley.
(d) Piston.

5. What is a wheel and rod attacked by a hinge?
(a) A spur.
(b) A worm.
(c) A prank.
(d) A crank.

Short Answer Questions

1. What do you have to use in order to accomplish work with half the effort?

2. What is the principle that states energy is neither created nor destroyed?

3. What occurs when very small atoms smash together?

4. How does a zipper operate?

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

Short Essay Questions

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

2. Discuss the four types of gears.

3. Discuss fulcrum points as pertaining to levers.

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

5. Define the two elements that explosives must contain.

6. How does a zipper work?

7. Discuss how sails are used on a boat.

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

9. Describe how a door wedge works.

10. How can electric heat keep things cold?

(see the answer keys)

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