Changing State & Conserving Matter

MATTERPORT DEPOT · MATTERLING

Changing State & Conserving Matter

State Change Vault

Learn with Matterling, then use your clues in the adventure. Pause whenever you need time to read or think.

Speech bubbles tell the story. Music and sound effects are optional; use the player’s volume control.

Train more: lesson transcript and free resources

Matterling — Changing State & Conserving Matter State Change Vault

Hi!

I'm Matterling.

Welcome to State Change Vault!

Will you help me investigate changing state & conserving matter?

The Grumblies have mixed up our clues.

Let's check the evidence!

Melting changes solid to liquid;

freezing changes liquid to solid.

Evaporation changes liquid to gas, and condensation changes gas to liquid.

Which change is liquid to gas?

  • A. Melting
  • B. Evaporation
  • C. Freezing

The answer is B: Evaporation

Melting changes solid to liquid;

freezing changes liquid to solid.

Evaporation changes liquid to gas, and condensation changes gas to liquid.

That clue helps us make sense of this place.

Changing state does not make the material vanish.

In a closed system, total mass stays the same

when all material is retained.

What is gas to liquid called?

  • A. Condensation
  • B. Melting
  • C. Evaporation

The answer is A: Condensation

Melting changes solid to liquid;

freezing changes liquid to solid.

Evaporation changes liquid to gas, and condensation changes gas to liquid.

Hmm...

how does that connect to our first clue?

Our sealed-container model starts with 50 g total mass and contains water

that evaporates.

The total remains 50 g because the water vapor stays inside.

What mass remains in the sealed model?

  • A. 0 g because the water became vapor
  • B. 100 g automatically
  • C. 50 g

The answer is C: 50 g

Our sealed-container model starts with 50 g total mass and contains water

that evaporates.

The total remains 50 g because the water vapor stays inside.

Nice investigating!

You've been following the evidence.

Let's bring our clues together before the adventure.

Melting changes solid to liquid;

freezing changes liquid to solid.

Changing state does not make the material vanish.

Our sealed-container model starts with 50 g total mass and contains water

that evaporates.

You're ready to explore State Change Vault with me!

Choose TRAIN MORE if you'd like another look at the clues.

Choose START ADVENTURE when you're ready.

I'll be right here!

Or choose BACK TO MAP.

Every stop is open to explore!

Free Changing State & Conserving Matter teacher guide and practice (PDF)

Explore any of the six lessons

Every destination is open. No account, purchase, previous lesson, or completed video is required.