Invisible Soda! My 5th & 6th graders added milk to cola, let it sit overnight, and then "ewww"ed at the disgusting results after the phosphoric acid molecules in the soda combined with the milk molecules and separated the mixture. Find this experiment at http://www.stevespanglerscience.com/lab/experiments/invisible-soda
Great action shot from the FINA swimming championships
"Laminar boundary layer flow" - Tyler Clary of the United States competes in the Men's 200m Backstroke final during day fourteen of the 14th FINA World Championships at the Oriental Sports Center on July 29 in Shanghai, China. Photo by Adam Pretty
Materials: Plastic bottle....water bottle. Veg. Oil Water Food coloring Alka Seltzer How to: Pour Oil in first we used about 2 cups, then pour water we used about 1 cup.....you want more oil than water. Then food coloring, maybe 3-4 drops....Then cut or brake Alka Seltzer in to 4-5 pieces and drop in and watch the lave rise. Have to say it's pretty fun to watch.