Kitchen Chemistry Teacher Guide
Teacher Facilitation Guide
2nd Grade Science
Lesson: Kitchen Chemistry Reactions
Learning Objective
Students will define a reaction as mixing two things to create a third thing and observe how gas bubbles take up space in liquids and solids.
Materials Needed
- Clear plastic cup
- Baking soda
- Vinegar
- Straw and cup of water (Warm-up)
- Student Reflection Journals
Lesson Timeline
5 min
Warm-up: Bubble Mystery
Instruction: Blow bubbles into a cup of water using a straw.
Ask the Class:
"What is inside these bubbles? How did they get there?"
5 min
Video: Why Does Cheese Have Holes?
Show the SciShow Kids video. Pause at 2:10.
Discussion Prompt:
"Jessi says a reaction is when two things mix and make a third thing. In Swiss cheese, what are the two things mixing? (Bacteria + Milk). What is the third thing? (Gas Bubbles!)"
20 min
Activity: Kitchen Chemistry Demo
Teacher performs the demo while students observe and record in journals.
- Before: Show the vinegar (liquid) and baking soda (powder). Have students draw these on their "Before" page.
- The Reaction: Add 2 tbsp of baking soda to the cup, then pour in vinegar.
- Observe: Watch the fizzing bubbles. Remind students that these bubbles are Gas.
- After: Students draw the "After" state, making sure to label the bubbles as Gas.
5 min
Closure: Turn and Talk
"How is our vinegar experiment like what happens inside Swiss cheese?"
Key take-away: Both use a reaction to make gas bubbles that take up space!
Essential Vocabulary
Reaction Mixing for something new
Bacteria Tiny living germs
Gas Air inside the bubbles
Kitchen Chemistry Slides
Kitchen
Chemistry
Why does Swiss Cheese have holes?
Bubble Mystery
Watch your teacher blow bubbles into a cup of water.
Think About It:
What is inside those bubbles? How did they get there?
The Secret of Swiss
SciShow Kids
Embedded media
PAUSE at 2:10 to discuss!
What is a Reaction?
"A REACTION is when two things mix together and sometimes they create a third thing."
Bacteria
Milk
=
Gas Bubbles!
Experiment Time!
1 The Mixture
- Liquid Vinegar
- Powdery Baking Soda
"Draw the BEFORE state in your journal now!"
2 The Reaction
What happens when we mix them?
Draw the AFTER state!
TURN AND TALK
"How is our vinegar experiment like what happens inside Swiss cheese?"
Kitchen Chemistry Journal Worksheet
Kitchen Chemistry
My Science Reflection Journal
Name:
Date:
Scientific Word: Reaction
A reaction is when two things mix together and sometimes they create a third thing.
1
Before
Draw the baking soda and vinegar before they are mixed.
2
After
Draw the bubbles! Label the Gas with an arrow.
My Observations
1. When I mixed them, the mixture started to:
2. The bubbles are made of _________________________ taking up space.
3. This experiment is like Swiss cheese because:
