# 5. Forces

## 1. Question

• What are you curious about?
Orange Peel.mp4

## 2. Explore

• Whiteboard: What's in the bubbles of boiling water? (groups of 3-4)

## 3. Lesson

1. Demos:
1. Penny Slug
2. Penny/Alcohol Drops.
2. Demos:
1. Penny Battery
2. Water/Pepper/Soap
4. Notes: Polarity
7. Activity: Dry Erase Markers (Randomized grouping)
2. Recreate with your own drawings and video.
3. Develop a hypothesis to explain this phenomena. Click here and share.
8. Demo: Hand Boilers
10. Notes: Intermolecular Forces (IMFs)

## 4. Apply

• Activity: Sand Analysis
1. Part I: Brown Sand
• Label one cup "Brown" with a sharpie. Grab a small ball of brown sand and place it in your cup. Play with it by pulling it apart, squeezing it, etc. Add a few drops of water to the sand and notice what happens. Describe your observations in your notes.
2. Part II: Yellow Sand
• Label one cup "Yellow Sand" with a sharpie. Divide the cup in thirds with a pen. Fill to 1/3 mark with blue sand and to 2/3 mark with water. Stir with your spoon. Scoop out some sand with your hand. Describe your observations in your notes.
3. Part III: Structure Analysis
• Shown below are the interior structure of "Brown" (left) and "Yellow" (right) sand. Hypothesize a possible identify for the red "?" in each sand. Draw a hypothetical completed structure for each in your notes and on a whiteboard along with a short explanation.

## 5. Extend

1. Demo 1: Inverted thumb revisited.
2. Demo 2: H2 balloon. Draw a diagram of the balloons inside somewhere in the room!
• Presentation:
1. Create a visual model of your hypothesis on a whiteboard. Add to your slides. (15 mins)
2. Present your Data, Hypothesis, and Whiteboard Model.
5. Lab: Making Ice Cream. Click here. (Change "Lab: Chromatography" to "Lab: Making Ice Cream")
1. What do the below videos demonstrate? How are the below videos related?
2. Given your understanding of the below videos, what is the purpose of "ice cream" salt.

## 6. Lesson

1. Lab: (Change "Lab: Chromatography" to "Lab: "Molarity of a Salt Solution").
1. Using only the materials provided, determine the moles of NaCl per Liter of solution in your sample" (record all data and work in your notes). Develop a procedure BEFORE you begin in your notes.