Dancing Hearts: We put candy hearts in Sprite to see what would happen. The students had hypothesis like they will dissolve, float, sink and make a rainbow. We observed the carbon dioxide pick the candy hearts up and float on top of the Sprite. Then, when the hearts reached the top the bubbles burst and the candy dropped down again.
Upside down glass of water: We filled a glass up with water, placed a piece of cardboard over the top and turned it upside down. We discovered that the air pressure around the glass was greater than the weight of the water. Therefore, the air pushing up from underneath the water was strong enough to hold the piece of cardboard in place so the water would not spill out.