Lesson 56 of 84 · Matter
Experiment⭐ 30 XP🧪 Potion KitchenShiny, Dull, Rough, and Smooth (Part 2)
Shiny, Dull, Rough, and Smooth (Part 2).
🎯 Your mission
Predict it first. Then prove yourself right (or wrong).
⚡ The twist
Mixing two safe things doesn't always make a safe thing.
Mind = Blown
💧 Hot water can freeze faster than cold water under the right conditions. Nobody fully understands why.
Make a hypothesis first
Predict: will the mixture get hotter, colder, or stay the same?
What You'll Learn
Air is matter even though you cannot see it. It takes up space—blow up a balloon to prove it!
Key Words
- ice
- change
- property
Materials Needed
- plastic bottles
- balloons
- measuring cups
Safety First
- Keep small objects away from young children.
- Work in a well-ventilated area when using vinegar or other strong-smelling substances.
- Dispose of materials properly after the experiment.
Steps
Read about Matter with a partner or grown-up.
Test 5 objects from your house: put each one in water. Make a chart of which sink and which float.
Watch carefully. What happens?
Draw and write about what you learned.
Check Your Understanding
Question 1
1 of 3Can you separate sand from water?
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 Matter for 2nd Grade
Get the full Matter track as a printable PDF — all lessons, worksheets, and answer keys.