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Answer Key
Grade 8 Science: Waves & Electromagnetic Spectrum Intro
1.
wave
2.
crest
3.
trough
4.
Amplitude
5.
Wavelength
6.
Frequency
7.
hertz/Hz
8.
mechanical/longitudinal
9.
distance between two consecutive identical points on a wave, such as crest to crest
10.
number of complete waves passing a point each second
11.
mechanical need a medium; electromagnetic can travel through vacuum
12.
radio, microwave, infrared, visible, ultraviolet, X-ray, gamma (accept reasonable order)
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