What are some cool, easy, fun science experiments for a sophmore??????

Answer 1

These look like fun:
http://www.funology.com/laboratory/index.htm

Here are more:
http://www.exploratorium.edu/science_explorer/

And more:
http://www.funsci.com/texts/index_en.htm

Quite a menu here:
http://education.usace.army.mil/clubhouse/experiments.cfm

These look cool:
http://scifun.chem.wisc.edu/HOMEEXPTS/HOMEEXPTS.HTML

If this or another answer here proves helpful in your research, you can encourage good answers by choosing one answer as the "best answer."

Cheers,
Bruce

Answer 2

You could try the energizer Battery Vs. Duracell Battery which lasts longer. Or another is Which Has more acidity, Coke, Orange Juice, or Grape Juice. Put in a penny in each one and let them sit for three days then go from there. those were some easy ones I did long ago in the far far away

Answer 3

a million get a roll of Mentos sweet and placed all of them in a experiment tube. two get a two liter bottle of coke three have pupils make a four foot perimeter across the coke bottle, four drop the experiment tube of Mentos into the coke and it'll spout up approximately five toes into the air. Extremely unique, low-cost and soooooo effortless.