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This quiz consists of 5 multiple choice and 5 short answer questions through Part 2, Harnassing the Elements, Exploiting Heat, Nuclear Power, pp. 142-173.

Multiple Choice Questions

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

2. Upon what does the amount of upthrust of an object in water depend?
(a) On what the water's electrical charge is.
(b) On whether or not the object is greater than one centimeter in diameter.
(c) On how much water the object displaces.
(d) On what the object's salinity is.

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

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

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

Short Answer Questions

1. How does a zipper operate?

2. Under normal circumstances, what force(s) does a molecule possess?

3. What is a substance that contains only one type of atom?

4. What happens if the force of upthrust is equal to the weight of an object in water?

5. What happens when you exert your strength across a longer distance?

(see the answer key)

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