Science // Polar Regions

Ice & Snow

Know that water can be solid (ice and snow) or liquid, that snow is made of tiny frozen ice crystals, that icebergs are huge chunks of ice floating in the ocean with most of their bulk hidden underwater, and that ice floats because it is lighter than liquid water

Ages
5 to 7
Type
Concept
Builds on
1 topic
Leads to
1 topic

Quick check

Does the learner know that icebergs are like floating ice mountains with most of the ice hidden under the water — and that the polar regions are covered in ice because it's so cold the water stays frozen?

Ask this to see whether the topic is secure.

Topic // Mastery

What mastery looks like

What a learner can do once this topic is secure.
  • Explain that ice and snow are frozen water (solid) and that water can change between solid and liquid
  • Describe an iceberg as a huge piece of ice floating in the ocean with most of it hidden below the surface
  • State that ice floats because frozen water is lighter than liquid water

Topic // Map

Where this fits

What to learn first and what this topic opens up, with the reason for each link. Required links come first.
  • RequiredMust come first
  • HelpfulHelps, but not essential

Before this

1 topic
  • Where Are the Poles?Required

    Polar Regions // Ages 5 to 7

    Must know about polar regions before learning about ice and snow there

You are here

Ice & Snow

Ages 5 to 7 // Concept

Leads to

1 topic
  • Ice & States of MatterRequired

    Polar Regions // Ages 7 to 9

    Basic ice and snow knowledge is prerequisite to understanding states of matter and ice types

Topic // Research-informed

Teaching notes

From the Marble Skill Taxonomy. These notes have not been validated in classrooms, so treat them as a starting point for your own judgement.

The approach

For ages 5–7: water can be solid (ice and snow) or liquid; snow is made of countless tiny frozen ice crystals; icebergs are huge chunks of ice floating in the ocean with most of their bulk hidden underwater; and ice floats because frozen water is lighter than the same amount of liquid water (not because of size or weight). Teach it observationally and hands-on, building intuition through predict-then-check with real floating ice, and seed the memorable 'tip of the iceberg' picture. A screen model where a child tries to push a floating cube under is a strong scaffold, but real materials deliver the felt surprise most directly.

Common misconceptions

  • Ice is a different substance from water — it is the same water, just frozen solid
  • All heavy things sink, so a giant iceberg should sink — ice floats no matter how big because it is lighter than water
  • An iceberg is all above the water you can see — most of it is hidden underwater
  • Snow is like white sand or cotton — it is made of tiny frozen ice crystals
  • Melting destroys the water — melting just turns solid ice back into liquid water

Useful representations

  • Clear cup with a floating ice cube and a marked waterline showing the hidden underwater bulk
  • Magnified snowflake photographs revealing crystal shapes
  • Solid ↔ liquid picture pair (ice → puddle → refreeze)
  • Iceberg cross-section: small tip above, large mass below the surface line

Teaching practices

  • Use real materials — float ice cubes in clear water, mark the line, and let children SEE most of the cube sits below the surface
  • Connect to lived experience: freezing water into ice, watching ice melt on a warm hand, catching or looking closely at snowflakes
  • Introduce 'floats because it's lighter than water' simply and truthfully; avoid the false rule 'heavy things sink' (a huge iceberg is heavy yet floats)
  • Look at magnified snowflake images so 'snow = many tiny ice crystals' is concrete, not abstract
  • Use the iceberg tip-of-the-iceberg image to seed the idea that most is hidden — a powerful, memorable picture

Activities to try

  1. 1

    Push the ice under — and watch it bob back

    Why it works: Ice floats because frozen water is lighter than the same amount of liquid water; size and weight do not decide it, and most of a floating chunk (like an iceberg) is hidden below the surface.

    1. Get a real ice cube or chunk and a clear cup or tub of water ready.
    2. Before placing the ice in the water, PREDICT out loud whether the big, heavy ice will sink or float, and say WHY first.
    3. Place it in the water and OBSERVE: it floats with only a small part sticking up.
    4. Mark the waterline on the clear cup so you can see how much sits BELOW the surface versus the little tip above.
    5. Try to push the ice all the way under and hold it there, then let go and watch it bob back up every time.
  2. 2

    Melt it, freeze it — same water

    Why it works: Ice and snow are frozen water (solid); melting turns the solid back into liquid water, and freezing turns liquid back into solid — the water itself is not destroyed or changed into a different substance.

    1. Hold a little ice or snow in a warm hand and watch it turn to water.
    2. Talk about how the puddle is the SAME water, just no longer frozen.
    3. Place liquid water somewhere cold (or imagine the freezer) and describe how it would turn back to solid ice.
    4. Match a picture pair or sequence: ice → melting puddle → refrozen ice, saying which is solid and which is liquid each time.
  3. 3

    What is snow made of?

    Why it works: Snow is made of many tiny frozen ice crystals — it is frozen water, not a fluffy material like cotton or sand.

    1. Look closely at real snowflakes, or at magnified snowflake photographs.
    2. Describe the tiny crystal shapes you can see.
    3. Explain that snow is not like white sand or cotton — it is made of countless tiny frozen ice crystals.
    4. Hold a little snow in a warm hand and watch it melt to water, confirming it is frozen water too.

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