This 45-page science mini-book was created to help teach the Next Generation Science Standards for 4th grade 4-PSR (Waves and their applications in technology for information transfer), but it could also be used with 5th or 6th graders because I added some additional information beyond the standard.This mini-book covers the following principles: what is a wave, what are mechanical waves, sound waves, water waves, seismic waves, spring waves, what are electromagnetic waves, radio waves, microwave