SCIENCE CLASS
'(<a href="http://www.j-archive.com/media/2006-04-26_DJ_08.jpg" target="_blank">Kelly of the Clue Crew drops a raisin into a glass and watches it bob back up.</a>)  A raisin in soda sinks because it's denser, & it <a href="http://www.j-archive.com/media/2006-04-26_DJ_08a.jpg" target="_blank">rises</a> because CO<sub>2</sub> pockets make it more this, from the Spanish for "float"'
buoyant