Additional materials for further exploration: straw; carbonated liquid; heated liquid.
Safety considerations: Take care when using sharp scissors to puncture hole; Water dripping on floor could cause slipping hazard; students may fall out of their seats with amazement due to disequilibrium.
Experiment procedure: 1. “Here is a bottle holding water, what do you think would happen if this bottle had a hole in the side of it?” (Class makes prediction: “water will leak out of hole”) 2. Take an empty bottle of the same type, use scissors to make a small hole in the side of the bottle near its bottom. “Lets see what happens with this bottle that has a hole on the side. I am going to fill it with water.”
Over a sink or basin, cover the hole with your finger and fill the bottle to the top with water.
Screw on the bottle cap, hold up the bottle, and say, “Now I will move my finger that is plugging the hole”… WOW!!!