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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 principle that states energy is neither created nor destroyed?
(a) The principle of energy change.
(b) The principle of energy gain.
(c) The principle of energy loss.
(d) The principle of the conservation of energy.

2. Why is cold water denser than warm water?
(a) Warm water has a greater ability to absorb force.
(b) Warm water's molecules move around more loosely.
(c) Cold water has a greater ability to coalesce.
(d) Cold water's molecules move around more loosely.

3. In flying, what is used to overcome weight from gravity?
(a) Lift created by the airfoil.
(b) Lift created by the tiller.
(c) Lift created by the rudder.
(d) Lift created by the nose.

4. How many ways can heat travel?
(a) Two.
(b) One.
(c) Three.
(d) Four.

5. Upon how many major principles do propellers and rudders work?
(a) Four.
(b) Two.
(c) Three.
(d) One.

Short Answer Questions

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

2. What causes increased heat in the process of conduction?

3. What are the effects of electricity?

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

5. What are large fins which adjust their tilt to compensate for waves?

(see the answer key)

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