Mass

Mass and weight are related science concepts that often are confused or misunderstood. What is the difference between them? What role does gravity play in determining an object's weight or mass? Watch this video for a helpful, entertaining explanation.

Images:
Space_Shuttle_Columbia_launching. Wikimedia Commons User: NASA. Retrieved 7/24/2012 from http://commons.wikimedia.org/wiki/Fil...

Apollo_15_flag,_rover,_LM,_Irwin. Wikimedia Commons User: Evil Monkey. Retrieved 7/24/2012 from http://commons.wikimedia.org/wiki/Fil...

Music:
This video features the song "The Blue Danube Waltz" by Johann Strauss, Leopold Stokowski conducting the Philadelphia Orchestra. Transfer and restoration by Bob Varney. Available under a Creative Commons license: Attribution 3.0 license.
http://archive.org/details/StraussWal...