Students will observe examples of Bernoulli's principle. Students will apply what they have learned about guiding airplanes by designing and constructing a model glider whose direction of flight can be controlled. Place two textbooks with a sheet of notebook paper on top on the table top. Ask a student volunteer to attempt to blow the sheet of paper off the books by blowing under the paper. All students hold their textbooks vertically and place a sheet of notebook paper in the book so that the paper hangs over the edge away from them.
Students attempt to force the paper down by blowing across the top of the paper.
A student volunteer blows through a funnel which has a ping-pong ball in it. Attempt to blow when the funnel is right side up and also when it is inverted. Place medium sized ball on the nozzle of the vacuum cleaner exhaust. Turn the vacuum cleaner on. Blow through a half straw across the top of another half straw that is placed in a beaker of water.