For 4th Grade STEM+ Special, the NGSS Standard focus is Waves and their Applications in Technologies for Information Transfer.  

This is one of the 4th Grade Physical Science Standards and we have been having fun experimenting with the concepts of waves. Hopefully 4th Graders will be able to share and explain words like amplitude, volume, wavelength, pitch, vibration, and more!

The specific standards are: 

PS4.A: Wave Properties

•  Waves, which are regular patterns of motion, can be made in water by disturbing the surface. When waves move across the surface of deep water, the water goes up and down in place; there is no net motion in the direction of the wave except when the water meets a beach. (Note: This grade band endpoint was moved from K–2.) (4-PS4-1)

•  Waves of the same type can differ in amplitude (height of the wave) and wavelength (spacing between wave peaks). (4-PS4-1)

PS4.B: Electromagnetic Radiation

•  An object can be seen when light reflected from its surface enters the eyes. (4-PS4-2)

PS4.C: Information Technologies and Instrumentation

•  Digitized information transmitted over long distances without significant degradation. High-tech devices, such as computers or cell phones, can receive and decode information—convert it from digitized form to voice—and vice versa. (4-PS4-3)