## Reflection: Diverse Entry Points Mini- Lesson: A Big Splash! - Section 3: Reflecting Upon Our Understanding

Hair Gel/ Baggy Displacement

Another strategy that was suggested to me that I am going to add to my bag of tricks is to place colored hair gel (preferably blue) in a Ziploc freezer bag to represent waves. Hair gel is really inexpensive at dollar type stores. Fill the Ziploc Freezer bag halfway with the gel. Have the students take their pencil and roll (like a rolling pin) over the Ziploc bag. To represent displacement, capture pictures of what happens to those waves when an object pushes against it. From their photos, they can record their observations in their science notebook. I thought about having my students use a marker or another heavier object to roll over the baggy to see the different ways the gel responds to the different size pen or object. This sounds like it might be fun and is a way to differentiate in case students are over stimulated by the water and splashing or if you do not have space to make a water mess on the floor.

A Second Method
Diverse Entry Points: A Second Method

# Mini- Lesson: A Big Splash!

Unit 3: Waves
Lesson 4 of 8

## Big Idea: Students drop several different sized objects into a bucket of water and observe what happens by measuring how long the wave continues after the displacement.

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Standards:
Subject(s):
Science, Waves, Sound, Sounds Waves, Energy transfer by displacement, timing, Evidence based conclusions, engineering
45 minutes

### Mary Ellen Kanthack

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