Signals and Noise, Oh Boy! — Grades 3-5
http://images.spaceref.com/news/corplogos/nasa.05.jpg
Students are introduced to the terms “signal” and “noise” in the context of spacecraft communication. They explore these concepts by listening to a computer-generated signal from two different distances with no additional background noise, and then with background noise. They compare their experiences in a science journal page.
http://www.nasa.gov/audience/foreducators/topnav/materials/listbytype/Signals_and_Noise.html
