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 are two things a sail can do for a craft?
(a) Give pulpulsion and direction.
(b) Lift and Slow.
(c) Propel and stop.
(d) Propel and repel.

2. What happens when you exert your strength across a longer distance?
(a) Your effort is reduced so you can take advantage of your greater strength.
(b) Your effort is reduced, and your lesser strength becomes sufficient.
(c) Nothing happens. It is all balanced by the decreased work required.
(d) Your effort is reduced, but your strength has to be increased.

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

4. What are different level marks for different types of water on the side of a ship called?
(a) Flow marks.
(b) Plimsoll lines.
(c) Anchor marks.
(d) Horizon marks.

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