Objective:
To understand how sound is produced and what creates variance in the tone or pitch of sound.

Standards:
Position and Motion of Objects (sound is produced by vibrating objects – how and why pitch changes).

Materials:
One piece of cellophane that is two inches square.

Procedure:
Tightly stretch the piece of cellophane [...]

MATERIALS
Each student group needs:
Textbook ( for checking definitions)
Notebook paper
Pen
The classroom is set up as 6 large tables (or push desks together), each containing a group of specimens and a list of questions for each table.
Table 1: Bat wing, bird wing, large moth, and dragon fly.
Table 2: Specimens of vertebrate hind feet, turtle, [...]