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

Multiple Choice Questions

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

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

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

4. What does the picture of a mammoth pulling a merry-go-round illustrate?
(a) Blocks and tackles.
(b) Wedges.
(c) Levers.
(d) Gears and belts.

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

6. What forms a molecule?
(a) Two or more atoms.
(b) Six or less atoms.
(c) One or more atoms.
(d) Five or more atoms.

7. What emits both infrared and light rays?
(a) A planet.
(b) The sun.
(c) The moon.
(d) A light bulb.

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

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

10. Under normal circumstances, what force(s) does a molecule possess?
(a) The force of electron splitting.
(b) An attracting force and a repelling force.
(c) The force of energy times matter.
(d) The force to overcome inertia.

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

12. What causes expansion?
(a) Gravity.
(b) Heat.
(c) Cold.
(d) Inertia.

13. What is the main idea in Part 2 of the book?
(a) The way atoms can be made more dense.
(b) The way work can cause energy to dissipate.
(c) Exploring the bonds of attraction and the movement of molecules to and from each other.
(d) The way force can be exerted to change atomic structure.

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

15. What occurs when very small atoms smash together?
(a) Nuclear fission.
(b) Nuclear clarification.
(c) Nuclear fusion.
(d) Nuclear inertia.

Short Answer Questions

1. What does increasing heat do to molecules?

2. How does heat travel through heating elements?

3. Why is cold water denser than warm water?

4. Why does a thermos lose heat?

5. What is applied to a lever to make it move?

(see the answer keys)

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