Phase Diagrams

Lab Brief #5

🎯 Your mission

Master the concept. Use it tomorrow.

⚡ The twist

Color changes mean atoms are rearranging — even if you can't see them.

What you'll learn

Phase diagrams show how temperature and pressure affect the state of matter. Water's triple point is where solid, liquid, and gas phases all exist simultaneously.

Key words

conservation of mass
Matter is never made or destroyed, only changed in a reaction.
solubility
How well a substance can dissolve in a liquid.

Make a hypothesis first

Before you mix: what color do you think it'll turn?

Say your guess out loud — then find out if you were right.

Step 1 of 4 · Read

Look at the vocabulary words and write a definition for each in your own words.

Step 2 of 4 · Do

Heat ice and record the temperature every minute as it melts and then boils. Graph the temperature changes and label each phase change.

Step 3 of 4 · Observe

Compare the before and after states.

Step 4 of 4 · Record

Write your conclusion: did the results match your hypothesis? What would you change next time?

Question 1 of 3

Which state of matter has a definite shape and volume?

How sure are you?😐 maybe

Question 2 of 3

Which state of matter fills its entire container?

How sure are you?😐 maybe

Question 3 of 3

What are the three common states of matter?

How sure are you?😐 maybe

Mind = blown

🧪 If you could remove all the empty space from atoms, the entire human race would fit in a sugar cube.

Nice work!

You got 0 of 3 right.

Next: Plasma: The Fourth State All lessons

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✨ More to explore

🌍 Where you see this in real life: This is happening in your kitchen right now — every time food cooks.

🏆 Stretch challenge (try it 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?”

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