The Rock That Floats on Water: Pumice!

To learn what causes this, see my "Why do things float?" webpage:

http://www.squidoo.com/why-fo-things-...

A demonstration of volcanic rocks, including pumice.

• #education
• #science
• #floatation
• #volcanoes
• #volcanic
• #rock
• #lava
• #pumice
• #displacement