Lesson 78 of 84 · Properties of Matter
Experiment⭐ 30 XP🧪 Potion KitchenDensity: Sink or Float? (Part 3)
Properties of Matter.
🎯 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
Density is how much mass is packed into a given volume. Objects denser than water sink, while less dense objects float. Oil floats on water because it is less dense.
Key Words
- mixture
- solution
Materials Needed
- salt
- sugar
- vinegar
- baking soda
- cups
Safety First
- Dispose of materials properly after the experiment.
Steps
Read the introduction and identify the main idea of this lesson.
Conduct a chromatography experiment: use a coffee filter and markers to separate the pigments in different colored inks.
Observe what happens and describe it in detail.
Record your observations in your science journal with measurements and descriptions.
Check Your Understanding
Question 1
1 of 3What is density?
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.
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