7. Electromagnetic waves have the same characteristics of a ___ wave
a. Mechancial
c.Longitudinal
b. Transverse
d.Surface
8. Electromagnetic waves can move through ___ and ___
a.Space and Gas
c.Matter and Space
b.Solids and Walls
d. Matter and Liquid
9 Mechanical waves can only travel through a ___
a.Light
c. Solids
b.Air
d.Medium
10 in a longitudinal wave, the distance between successive rarefaction's and successive compression's is its ___
a. Wavelength
c. Trough
b.Crest
d.Amplitude
11 Which of the following is an example of a longitudinal wave?
a. A sound wave
b. A wave made by a moving rope
c. A wave made by dipping your hand in a pond
d.An ocean wave
13. will shouts "HELLO" in a canyon. the sound bounces back to him as an echo. this is an example of a wave ____
a. being reflected
b. being refracted
c. being diffracTed
d. interfering with another wave




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