1. Waves

2. Transverse wave – a wave that’s energy moves perpendicular to the direction of the wave.

7. Compression wave (Longitudinal wave) – a wave that’s energy moves parallel to the direction of the wave

9. Compression – where the coils, or the waves, are bunched together
Rarefaction – where the coils, or the waves, are spread apart

10. Compression waves can look like this too
Wavelength
Rarefaction
Compression

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