SciencePolar RegionsAges 9–11

Glaciers & Ice Sheets

Understand how glaciers and ice sheets form and behave — snow accumulates over centuries and compresses into dense ice, glaciers flow slowly downhill under their own weight carving U-shaped valleys and depositing moraines; the Greenland and Antarctic ice sheets together hold enough ice to raise sea levels by over 65 metres; and ice cores drilled from these sheets contain trapped air bubbles that reveal Earth's climate history going back 800,000 years

Lesson

Set out your lesson

Explain how accumulated snow becomes moving ice and why ice cores contain past-air evidence.

Before teaching

Activity

Can discuss the supplied example in an accessible mode; adapt directions without supplying the target answer.

Policy

Check the learner can follow the model with support before moving on. Source prerequisite ordering is not learner mastery; return to prerequisite work when needed.

Printer, credit, and teaching notes

Use a sequence of supplied process cards; no freezer experiment is claimed to reproduce glacier formation. Open S first, G together, then T alone; put S and G away before T. Keys stay adult-only. No purchase or printing is required; an unavailable physical observation remains pending, not passed.

Materials are ready in each step. Use them on screen or print just the current step. Put teaching examples aside before the learner tries.

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What this lesson covers and its limits

These are bounded opportunities, not learner attainment. Partial and blocked source requirements remain so.

partial: Understand how glaciers and ice sheets form and behave — snow accumulates over centuries and compresses into dense ice, glaciers flow slowly downhill under their own weight carving U-shaped valleys and depositing moraines; the Greenland and Antarctic ice sheets together hold enough ice to raise sea levels by over 65 metres; and ice cores drilled from these sheets contain trapped air bubbles that reveal Earth's climate history going back 800,000 years
Exact 65-metre and 800,000-year description quantities not independently supported in this packet and are not asserted. No physical glacier observation.
partial: Describe how glaciers form: snow accumulates, compresses, and becomes dense ice that flows slowly under its own weight
Exact 65-metre and 800,000-year description quantities not independently supported in this packet and are not asserted. No physical glacier observation.
partial: Explain that the Greenland and Antarctic ice sheets hold enough water to raise sea levels dramatically if melted
Exact 65-metre and 800,000-year description quantities not independently supported in this packet and are not asserted. No physical glacier observation.
partial: Describe how ice cores reveal climate history through trapped air bubbles from hundreds of thousands of years ago
Exact 65-metre and 800,000-year description quantities not independently supported in this packet and are not asserted. No physical glacier observation.
partial: Can {{name}} explain how glaciers form from layers of snow pressed into ice, how they slowly carve valleys, and that scientists drill into ice sheets to learn about Earth's climate thousands of years ago?
Exact 65-metre and 800,000-year description quantities not independently supported in this packet and are not asserted. No physical glacier observation.

Exact 65-metre and 800,000-year description quantities not independently supported in this packet and are not asserted. No physical glacier observation.

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Explain how accumulated snow becomes moving ice and why ice cores contain past-air evidence.

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Learning resources

Extra practice links — they do not replace Gakuva’s teaching approach.

NASA Climate Kids · Practice link — not the full lesson

Weather and Climate

Open practice(new tab)

Before you open · source notes

Weather and Climate supports Glaciers & Ice Sheets. An adult previews and guides; this is a learning page, not a scored quiz.

Free educational page, no sign-in required for the tested path.

Before you open

Ask the learner one fact they learned and one question they still have.

Opening this link does not save learning or assess mastery.

Source, access and review notes

Public NASA Climate Kids page. An anonymous GET on 2026-11-12 returned HTTP 200 with no login or payment prompt for this URL. Opening the link does not save practice or assess mastery. An adult should preview and guide the learner.

NASA Climate Kids. “Weather and Climate.” External page; Gakuva does not copy, host, embed, or redistribute materials.

Unknown — link only

Check understanding

Describe how glaciers form: snow accumulates, compresses, and becomes dense ice that flows slowly under its own weight
Explain that the Greenland and Antarctic ice sheets hold enough water to raise sea levels dramatically if melted
Describe how ice cores reveal climate history through trapped air bubbles from hundreds of thousands of years ago

“Can your child explain how glaciers form from layers of snow pressed into ice, how they slowly carve valleys, and that scientists drill into ice sheets to learn about Earth's climate thousands of years ago?”

Curriculum record

Type: Conceptual
Subject: Science
Domain: Polar Regions
Age range: Ages 9–11