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

Multiple Choice Questions

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

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

3. What is convection?
(a) When heat causes wind.
(b) Heat moving from a liquid or gas molecule to another.
(c) The way a molecule radiates heat.
(d) When heat increases velocity.

4. What are small propellers mounted in the base of a ship's hull?
(a) Rudders.
(b) Tillers.
(c) Thrusters.
(d) Stablizers.

5. What happens if the force of upthrust is equal to the weight of an object in water?
(a) The object floats.
(b) The object moves across the surface of the water.
(c) The object sinks.
(d) The object projects out of the water.

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

7. What are large fins which adjust their tilt to compensate for waves?
(a) Stabilizers.
(b) Screws.
(c) Rotaries.
(d) Fans.

8. What is applied to a lever to make it move?
(a) Gravitational pull.
(b) Work.
(c) Force.
(d) Balance.

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

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

11. What controls the movement in a gear system?
(a) The rotation of the gear.
(b) The inertia needed to be overcome.
(c) The size of the belt.
(d) The size of the gear.

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

13. What happens when you exert your strength across a longer distance?
(a) Your effort is reduced so you can take advantage of your greater strength.
(b) Your effort is reduced, and your lesser strength becomes sufficient.
(c) Nothing happens. It is all balanced by the decreased work required.
(d) Your effort is reduced, but your strength has to be increased.

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

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

Short Answer Questions

1. In how many elements did the Greek believe?

2. How many ways can heat travel?

3. When an object absorbs light rays, how is the energy held in the object?

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

5. How does a wedge move an object up an inclined plane?

(see the answer keys)

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