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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. The rack and pinion is an example of ______________.
(a) A lever.
(b) A stifle.
(c) A gear.
(d) A wedge.

2. In how many elements did the Greek believe?
(a) Seven.
(b) Three.
(c) Eight.
(d) Four.

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

4. What additional tasks can a boat with two triangular sails do?
(a) Multiply the suction force by three.
(b) Achieve two additional suction forces.
(c) Achieve one additional suction force.
(d) Divide the suction force.

5. What is any engine that burns fuel inside the engine?
(a) Thermodynamic engine.
(b) Steam engine.
(c) Internal combustion engine.
(d) Nuclear fusion engine.

Short Answer Questions

1. What happens when molecules are squeezed or stretched beyond the boundaries of their comfortable balance?

2. What is an example of a second-class lever?

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

4. What is a first-class lever?

5. What is a wheel and rod attacked by a hinge?

Short Essay Questions

1. How does a zipper work?

2. How do heating elements work?

3. Define the two elements that explosives must contain.

4. Discuss the relation of effort to distance.

5. Explain thermal radiation.

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

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

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

9. What is the most common form of inclined plane in machines? How does it work?

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

(see the answer keys)

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