Part of Lesson Plan: How do you spit?
Activity Overview / Details
Items needed for Lecture: One Ballon, paper cup, safety pin or needle, 2 lemons cut in half, 1 water bottle.
Prior to students arriving fill balloon 1/2 way with water and set out the lemons on a tray.
Students will be seated on assigned seats. Once students have settled down turn around (giving your back to them). Hold balloon filled with water close to your mouth, prick water balloon and compress (squirt) water as you turn towards students. This action will surprise students and you will have their attention.
Ask them if they have noticed as they open their mouth a small stream of saliva is felt. At a show of hands: How many of you have experienced this?
Explained: this is called "Gleeking" and is a thin stream of saliva. This action occurs when the mouth is opened and then gently lifting your tongue. The sublingual salivary gland releases a thin stream of saliva.
Since not every student might have experienced "Gleeking" move on to the next illustration. Ask students to have a piece of paper and pen in front of them to write down their observations. What did they experience while they watched the illustration. Was there any facial muscle reactions?" Be specific
"All eyes on me", Begin to squirt lemon to paper cup. (give them 5 sec to write their observations. Now ask for two volunteers who like lemon. To continue engaging with atudents: Now instruct volunteers to squeeze lemon into mouth.
Questions directed to the volunteers:
What did the volunteers experience prior to squeezing the lemons?
What occured after squeezing lemon into their mouths?
Volunteers will share their experience with the class. Teacher: Ask for a show of hands if they experienced the same as they observed.