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This quiz consists of 5 multiple choice and 5 short answer questions through Part 3, Working with Waves.

Multiple Choice Questions

1. How does a zipper operate?
(a) Just using triangular wedges.
(b) It is not a wedge system, but rather a rolling arc system.
(c) The use of triangular wedges and lower curved wedges.
(d) Just lower curved wedges.

2. What is a first-class lever?
(a) Where the effort and the load are equal distances from the fulcrum.
(b) Where the distance is further from the fulcrum than the effort.
(c) Where the effort is a greater distance from the fulcrum than the load.
(d) Where there is no load needed for the effort.

3. What is suction referred to in the act of flying?
(a) Floating.
(b) Lift.
(c) Glide.
(d) Sinking.

4. Why can a dog hear a dog whistle that humans cannot?
(a) They can isolate a sound better than humans.
(b) They can hear sound waves at a greater range of frequencies.
(c) They have been trained to listen to that particular frequency.
(d) Their eardrums are larger.

5. What happens when molecules are squeezed or stretched beyond the boundaries of their comfortable balance?
(a) The molecules dissipate into individual atoms that can be lost or destroyed.
(b) They remain in an uneasy balance.
(c) The molecules are driven to remain unbalanced.
(d) The molecules are driven to return to that balance.

Short Answer Questions

1. What are two things a sail can do for a craft?

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

3. What does the picture of a mammoth pulling a merry-go-round illustrate?

4. What occurs when molecules begin vibrating in a solid, then speed up their vibration when heated?

5. The rack and pinion is an example of ______________.

(see the answer key)

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