Lesson 42 of 84 · Chemical Reactions
Simulation⭐ 30 XP🧪 Potion KitchenWhat Is a Chemical Reaction? (Part 2)
Chemical Reactions.
🎯 Your mission
Run the sim. Spot the pattern.
⚡ The twist
Color changes mean atoms are rearranging — even if you can't see them.
Mind = Blown
🧪 If you could remove all the empty space from atoms, the entire human race would fit in a sugar cube.
Make a hypothesis first
Before you mix: what color do you think it'll turn?
What You'll Learn
In a chemical reaction, substances called reactants are transformed into new substances called products. The total mass stays the same because atoms are rearranged, not created or destroyed.
Key Words
- electron
- ion
Steps
Look at the vocabulary words and write a definition for each in your own words.
Build a model of an atom using craft supplies. Show protons, neutrons, and electrons in the correct arrangement. Label each particle.
Note any unexpected results and think about why they happened.
Share your findings with the class or a partner and discuss what you learned.
Check Your Understanding
Question 1
1 of 3What is a mixture?
Where you see this in real life
This is happening in your kitchen right now — every time food cooks.
Stretch Challenge
Try this in real life this week.
Find one ingredient in a snack and look up what it does.
For the dinner table
“What's something we cook that mixes things together this way?”
Next Smart Experiment
We'll pick an experiment that matches exactly how you're thinking right now.
Share this experiment
Send it to a parent who's looking for a 10-minute kitchen science win.
Checkout complete lesson on Chemical Reactions for 7th Grade
Get the full Chemical Reactions track as a printable PDF — all lessons, worksheets, and answer keys.