View a FREE sample

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) Lift and Slow.
(b) Propel and repel.
(c) Propel and stop.
(d) Give pulpulsion and direction.

2. Upon what principle does a pulley work?
(a) The rotation of one gear pulls the other.
(b) It is easier to pull something down rather than up.
(c) The amount of work required is halved by the amount of effort.
(d) It is easier to overcome gravity than force.

3. What urges do molecules possess?
(a) Only the urge to huddle together.
(b) The urge to huddle together or spread apart.
(c) None.
(d) Only the urge to spread apart.

4. What is a substance that contains only one type of atom?
(a) A cell.
(b) An element.
(c) A molecule.
(d) A quantum.

5. What is an object's weight divided by its volume?
(a) The object's ability to exert force.
(b) An object's elemental number.
(c) An object's density.
(d) The object's constant mass.

Short Answer Questions

1. How does floating harness the power obtained by squeezing or stretching molecules?

2. What is one example the author uses of a wedge?

3. What additional tasks can a boat with two triangular sails do?

4. What is a first-class lever?

5. Upon what does the amount of upthrust of an object in water depend?

(see the answer key)

This section contains 340 words (approx. 2 pages at 300 words per page) View a FREE sample