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

2. What do compound levers contain?
(a) No fulcrum but two points of force and two of load.
(b) A single fulcrum and two points of force and two of load.
(c) Two fulcrums and one point of force and load.
(d) Two fulcrums and two points of force and two of load.

3. When an object absorbs light rays, how is the energy held in the object?
(a) There is no energy involved.
(b) As inertial energy.
(c) As heat.
(d) As kinetic energy.

4. 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.

5. What is any engine that burns fuel inside the engine?
(a) Internal combustion engine.
(b) Thermodynamic engine.
(c) Nuclear fusion engine.
(d) Steam engine.

Short Answer Questions

1. What is a fulcrum?

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

3. What do you have to use in order to accomplish work with half the effort?

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

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

(see the answer key)

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