States of Matter
The first three states of matter
Change of State (from Skoool)
Melting and boiling point (from Skoool)
States of Matter: Changes in State (from HowStuffWorks)
A Matter of State
Other states of matter
Plasma: The 4th State of Matter (from University of Maryland)
Plasmas (from chem4kids)
Bose-Einstein Basics (from chem4kids)
Bose-Einstein Condensate - BBC
The particle model - Activity
Gas Properties - Simulation
Stability of water in straw
When you put your finger over the end of a drinking straw in a glass of water, you can lift up the straw and the water remains inside it. Why?
When you put your finger over the end of the straw (and get a good seal) then lift it from the glass, the water level in the straw actually falls a little. The pressure of the atmosphere at the bottom of the straw balances the pressure inside the straw at the top plus the hydrostatic pressure. (Source)
[Advanced physics explanation: Maximun diameter of the tube]
