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This quiz consists of 5 multiple choice and 5 short answer questions through Part 3, Working with Waves.

Multiple Choice Questions

1. What principle is in use as a propeller pushes the water back and as that same water which has been pushed back rolls forward again and hits the propeller?
(a) The Principle of Push and Thrust.
(b) The Principle of Gravity.
(c) The Principle of Action and Reaction.
(d) The Principle of Force and Inertia.

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

3. What occurs when molecules begin vibrating in a solid, then speed up their vibration when heated?
(a) Solid combustion.
(b) Radiation.
(c) Internal combustion.
(d) Conduction.

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

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

Short Answer Questions

1. Of what is color photography paper made when printing from a negative?

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

3. What are two things that can happen to light rays?

4. What makes it possible to use light and radio waves to communicate?

5. What urges do molecules possess?

(see the answer key)

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