NASA
Cleaning Water
From their sweat to the water vapor in their breath, astronauts recycle every possible drop of water while in space. After watching a short video describing the different ways materials are recycled and reused in space shuttles, young...
Curated OER
Raindrops Keep Burning On My head
Students investigate the effects and causes of acid rain. They test pH of household items to familiarize themselves with pH scale and compare that information with acid rain solutions. They investigate impact of acid rain via internet...
City University of New York
Brooklyn College: Bicarbonate Buffer
Explains the role of carbonic acid in the blood as part of a buffer system. Includes reactions.