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This quiz consists of 5 multiple choice and 5 short answer questions through Part 2, Harnassing the Elements, Introduction, Floating, Flying and Pressure Power, pp.91-141.

Multiple Choice Questions

1. What does a driving force initiate?
(a) Work.
(b) Inertia.
(c) Movement.
(d) Electron activity.

2. What causes sideways movements of a ship?
(a) Cams.
(b) Rods.
(c) Thrusters and stabilizers.
(d) Jone's principle.

3. How many types of gears are there?
(a) Seven.
(b) Four.
(c) Five.
(d) One.

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

5. What controls the movement in a gear system?
(a) The rotation of the gear.
(b) The size of the gear.
(c) The inertia needed to be overcome.
(d) The size of the belt.

Short Answer Questions

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

2. What do compound levers contain?

3. What is a first-class lever?

4. What is the principle that states energy is neither created nor destroyed?

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

(see the answer key)

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