Separating by Size & State

MIXMASTER BAZAAR · MIXLING

Separating by Size & State

Filter Mill

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

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Train more: lesson transcript and free resources

Mixling — Separating by Size & State Filter Mill

Hi!

I'm Mixling.

Welcome to Filter Mill!

Will you help me investigate separating by size & state?

The Grumblies have mixed up our clues.

Let's check the evidence!

Separation methods use differences in properties.

Sieves separate suitable particle sizes;

filters can trap undissolved particles;

settling allows some particles to fall out.

What does the filter remove in our model?

  • A. Undissolved sand
  • B. All dissolved salt
  • C. Every water molecule

The answer is A: Undissolved sand

Our mixture contains sand and salt water.

Filtering removes the sand, while the dissolved salt remains in the filtrate.

A later evaporation step can recover salt.

That clue helps us make sense of this place.

Ordinary filters do not remove dissolved salt from water.

Evaporation can leave the salt behind as water enters the air.

What remains dissolved after filtering?

  • A. Large trapped sand grains
  • B. Only air
  • C. Salt

The answer is C: Salt

Our mixture contains sand and salt water.

Filtering removes the sand, while the dissolved salt remains in the filtrate.

A later evaporation step can recover salt.

Hmm...

how does that connect to our first clue?

Our mixture contains sand and salt water.

Filtering removes the sand, while the dissolved salt remains in the filtrate.

A later evaporation step can recover salt.

Which step can leave salt behind?

  • A. Painting the container
  • B. Evaporating water
  • C. Using the same ordinary filter again

The answer is B: Evaporating water

Ordinary filters do not remove dissolved salt from water.

Evaporation can leave the salt behind as water enters the air.

Nice investigating!

You've been following the evidence.

Let's bring our clues together before the adventure.

Separation methods use differences in properties.

Ordinary filters do not remove dissolved salt from water.

Our mixture contains sand and salt water.

You're ready to explore Filter Mill 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!

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