Air-Pressure Bottle Fountain

Water shoots up the outlet tube. Ask students to predict what will happen. Increase air pressure in bottle. Key idea: Higher air pressure pushes on the water surface, forcing water up the tube. Ask: What invisible material is pushing the water? Safety and cleanup: Plastic bottle; secure tubing. https://www.google.com/search?q=%22Air-Pressure+Bottle+Fountain%22+science+demonstration+experiment