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

Multiple Choice Questions

1. What urges do molecules possess?
(a) Only the urge to spread apart.
(b) None.
(c) The urge to huddle together or spread apart.
(d) Only the urge to huddle together.

2. What happens when an object is placed in water?
(a) The water molecules push against the object.
(b) The object absorbs the water's atoms.
(c) The object sinks.
(d) The water is repelled by the electrical force of the object.

3. Upon what principle does a pulley work?
(a) The rotation of one gear pulls the other.
(b) It is easier to pull something down rather than up.
(c) The amount of work required is halved by the amount of effort.
(d) It is easier to overcome gravity than force.

4. How does a zipper operate?
(a) Just lower curved wedges.
(b) It is not a wedge system, but rather a rolling arc system.
(c) The use of triangular wedges and lower curved wedges.
(d) Just using triangular wedges.

5. What does the inclined plane do?
(a) Decreases gravitational force.
(b) Extends the distance to a rise.
(c) Increases effort.
(d) Decreases effort.

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

7. What are different level marks for different types of water on the side of a ship called?
(a) Horizon marks.
(b) Plimsoll lines.
(c) Anchor marks.
(d) Flow marks.

8. How does a rocket engine power the craft?
(a) By the turning of a propeller.
(b) By the combustion of two propellants.
(c) By nuclear fusion.
(d) By the combustion of one propellant.

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

10. What are two things a sail can do for a craft?
(a) Give pulpulsion and direction.
(b) Propel and repel.
(c) Lift and Slow.
(d) Propel and stop.

11. What are two things that can happen to light rays?
(a) They can be destroyed by gamma rays.
(b) They can be dissolved.
(c) They can be dissipated.
(d) They can be reflected or absorbed.

12. What debris does a nuclear explosion create?
(a) Acid rain.
(b) Fallout.
(c) None.
(d) Steam.

13. Why does a thermos lose heat?
(a) The argon absorbs the heat.
(b) The heat can travel through the stopper.
(c) The molecules eventually slow down.
(d) The oxygen absorbs the heat.

14. What is another type of wedge the author mentions?
(a) The caliper.
(b) The inversion ring.
(c) The gate latch.
(d) The sharp tapered edge of axes.

15. What is an example of a second-class lever?
(a) A crane.
(b) A nutcracker.
(c) A clock.
(d) An engine block system.

Short Answer Questions

1. How many ways can heat travel?

2. What additional tasks can a boat with two triangular sails do?

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

4. What does increasing heat do to molecules?

5. How many forces hold things together?

(see the answer keys)

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