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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 is the factor which determines an object's ability to float?
(a) Force.
(b) Inertia.
(c) Volume.
(d) Density.

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

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

4. What controls direction on a ship?
(a) A screw.
(b) A rudder.
(c) A valve.
(d) A drive.

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

Short Answer Questions

1. What is a fulcrum?

2. What are different level marks for different types of water on the side of a ship called?

3. How many forces hold things together?

4. How does a wedge move an object up an inclined plane?

5. What is the formula for work done?

(see the answer key)

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