Study Guide for Chapter 25 and 26.
1)	Which is faster, the speed of sound or the speed of light?
2)	How are sound waves produced?
3)	In which medium does sound travel the fastest?
4)	Know that sound wave is a longitudinal wave
5)	Know that sound waves must travel through a medium and not in a vacuum
6)	Know what determines the speed of sound waves
7)	Know that vibration is increased by vibrating something larger
8)	Know the difference between rarefaction and compression
9)	Know the definition of the word pitch
10)	Know that the source of all wave motion is as a result of a vibration
11)	Know the definition of period, wave length, amplitude, crest, and trough
12)	Define Hertz
13)	Know that sound wave are longitudinal wave
14)	Know that characteristics of a longitudinal wave
15)	Know the relationship between frequency and period
16)	Know the difference between a wave length and frequency
17)	Study the formula for period, frequency, wave length
18)	Remember 1 megahertz = 1 000 Hertz
19)	Know the differences between longitudinal and transverse waves