- 
Objective:
The students will be able to explain Bernoullie’s Principle by creating their own  hang gliders to demonstrate their understanding of this effect.

Materials:
*pieces of 2-inch x 10-inch paper for each student
*K'NEX toys
*paper for wings

Procedure :
  1.  Distrubute pieces of 2-inch x 10-inch paper to each student.
  2.  Demostrate to the students how to place the piece of paper against  their chin.
  3.  Instruct students to hold one end of the paper against their chin, just below their bottom lip.
  4.  Have the students blow just above the top of the paper.
  5. Have the students observe the movement of the paper strip.
  6. Ask the students, "What happened to their piece of paper and why it reacted that way?"
  7. Explain to the students that their paper should of lifted upward and demonstate this for the students.
  8. Explain Bernoulli's principle and that the air over the top of a wing moves more quickly so the
      pressure on top of the wing is less than the pressure under the wing.  This difference in pressure
      causes the wing to lift like with the blowing above the paper.
  9. Have the students think about the shape of the wings on an airplane, especially how the shape of
      the top of an airplane's wing is more curved than the wing's bottom.
10. Group the students into pairs of two to create their own hang gliders with the K'NEX toys, using
      paper and other materials to create a wing to demonstrate their understanding of this effect.

Evaluation:
The students will write a short explaination as to why they created their hang glider the way they did.

Indiana Science Proficiency:
*1.3 Manipulation and Observation: Students should be able to assemble, take apart, and reassemble constructions using interlocking blocks, erector sets, and the like.
*1.4 Communication Skills: Students should be able to describe and compare things in terms of number, shape, texture, size, weight, color, and motion.
*8.2 Models: Students should know that many of the toys children play with are like real things only in some ways.   They are not the same size, are missing many details, or are not able to do all of the same things.