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This test consists of 15 multiple choice questions and 5 short answer questions.

Multiple Choice Questions

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

2. What are the effects of electricity?
(a) It depends on the amperage.
(b) Only light.
(c) Heat, light, and magnetism.
(d) Only magnetism.

3. What do you have to use in order to accomplish work with half the effort?
(a) Twice the distance.
(b) Half the distance.
(c) One-third the distance.
(d) Ten percent of the distance multiplied by one-third of the effort.

4. What is a substance that contains only one type of atom?
(a) A cell.
(b) An element.
(c) A molecule.
(d) A quantum.

5. What is the principle behind the action of any machine?
(a) The conservation of energy.
(b) The type of energy it takes to make the machine work.
(c) The amount of energy it saves.
(d) The amount of energy it expends.

6. How many ways can heat travel?
(a) Two.
(b) One.
(c) Three.
(d) Four.

7. What is the result of a collision of molecules which break on impact forming new and different molecules?
(a) Fusion.
(b) Radiation.
(c) Combustion.
(d) Fission.

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

9. What is a fulcrum?
(a) A point at which inertia is overcome.
(b) A special sort of wedge.
(c) A formula for determining energy needed to do work.
(d) A pivot point.

10. How many forces hold things together?
(a) Two.
(b) One.
(c) Four.
(d) Three.

11. What does one have to understand in order to understand the way things work?
(a) The underlying principle.
(b) The terms of physics.
(c) The function of something.
(d) The reason something is made.

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

13. Upon how many major principles do propellers and rudders work?
(a) Two.
(b) One.
(c) Three.
(d) Four.

14. How many types of gears are there?
(a) Five.
(b) Four.
(c) Seven.
(d) One.

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

Short Answer Questions

1. Where are wheels and axles found?

2. What is convection?

3. What is the density of salt water compared to fresh water?

4. What is suction referred to in the act of flying?

5. What is the term for the process of molecules moving further apart in convection?

(see the answer keys)

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