Lesson 68 of 84 · Matter
Lesson⭐ 30 XP🧪 Potion KitchenHeat and Cold Change Matter (Part 3)
Heat and Cold Change Matter (Part 3).
🎯 Your mission
Master the concept. Use it tomorrow.
⚡ 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
Temperature affects matter. Heat makes ice melt, and cold makes water freeze.
Key Words
Tap a word to see its definition.
Steps
Read the introduction. What is this lesson about?
Mix salt into warm water and cold water. Stir 20 times each. Which dissolves faster?
Look for something that changed. What is it?
Circle the correct answer on your worksheet.
Check Your Understanding
Question 1
1 of 3What tool measures temperature?
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 Matter for 2nd Grade
Get the full Matter track as a printable PDF — all lessons, worksheets, and answer keys.