Lesson 74 of 84 · Properties of Matter
Experiment⭐ 30 XP🧪 Potion KitchenChanging States: Melting and Freezing (Part 3)
Properties of Matter.
🎯 Your mission
Set it up. Test it. Be amazed.
⚡ The twist
If it bubbles, something invisible is escaping.
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
Guess: will the fizz be loud, soft, or none at all?
What You'll Learn
Physical changes alter the appearance of matter without changing its chemical identity. Cutting paper, melting ice, and dissolving sugar are all physical changes.
Key Words
- atom
- element
- compound
Materials Needed
- plastic bottles
- balloons
- measuring cups
- paper towels
- thermometer
Safety First
- Use materials only as directed in the experiment.
- Keep small objects away from young children.
- Work in a well-ventilated area when using vinegar or other strong-smelling substances.
Steps
Review the background information on Properties of Matter before starting.
Heat ice and record the temperature every minute as it melts and then boils. Graph the temperature changes and label each phase change.
Look for patterns in your observations.
Make a graph or chart showing your results.
Check Your Understanding
Question 1
1 of 3Which is an example of a chemical change?
Where you see this in real life
Your toothpaste, your soap, even your breakfast involves this.
Stretch Challenge
Try this in real life this week.
Ask a grown-up to help you mix two safe kitchen things. Predict what will happen first.
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 Properties of Matter for 4th Grade
Get the full Properties of Matter track as a printable PDF — all lessons, worksheets, and answer keys.