Vocabulary
wave, sound, vibrations, wavelength, frequency, amplitude, peak, trough, undulating, mechanical waves, oscillate, surface waves, transverse wave, perpendicular, longitudinal wave, parallel, period, pitch, wave speed, matter, transparent, translucent, opaque, reflection, absorption, energy, wavelength, gamma rays, x rays, matter, transparent, translucent, opaque, reflection, absorption, energy, wavelength, gamma rays, x rays, light, reflect, reflection, refract, refraction, transparent, medium, disperse, scatter, emit, opaque, transmission, surface