• Quick retrieval from earlier learning (Salt water or fresh water? Where Earth's water is). Students answer on mini whiteboards.
• Show answers together and note who needs support in the main task.

1. Is this salt water or fresh water: a glacier? (salt water / fresh water) → fresh waterPrompt: Is it part of the sea, or does it come from rain, snow and rivers?
2. Where is most of Earth's FRESH water? (in swimming pools / in rivers / frozen in ice sheets and glaciers / in clouds) → frozen in ice sheets and glaciersPrompt: Antarctica and Greenland are covered in thick ice.
3. True or false? Oceans cover most of Earth's surface. (True / False) → TruePrompt: Oceans are salty. Where else is water found?

• Pass round different rocks and ask how each one might have formed.
• Share the objective: Frozen water on Earth: glaciers, ice sheets and icebergs. Read the success criteria together.

• Work through the example out loud, saying why you do each step, not just what you do.
• Example: Which description matches a glacier?
• Step 1: So the answer is: a huge river of ice that slowly slides downhill
• Answer: a huge river of ice that slowly slides downhill
• Pause after each step and ask a student to say what comes next.

• Do these together. Students try each step on whiteboards before you reveal it.
• Use the hints as prompts rather than giving the answer.

1. Which description matches frost? (soft ice crystals that fall from clouds / thin ice crystals that form on cold surfaces overnight / a layer of frozen seawater on the ocean surface / a huge river of ice that slowly slides downhill) → thin ice crystals that form on cold surfaces overnightPrompt: Think about where each one is found and how big it is.
2. Is an iceberg made of salt water or fresh water? (fresh water, because it broke off a glacier made from snow / it has no water in it / salt water, because it is in the sea / it is made of sugar) → fresh water, because it broke off a glacier made from snowPrompt: Where did the ice first come from?

• Students work on the student sheet. Circulate and check the first two answers of every student early.
• Students who finish: write a question of their own for a partner, with the answer.

The 6 questions are on the student sheet below, with answers in the key.

• Two questions on their own. Sort answers into got it / nearly / not yet to plan the next lesson.

1. Glaciers in the Alps and the Rockies are shrinking. What is the main reason? (The mountains are growing. / People are taking the ice home. / Earth's climate is getting warmer. / It is snowing too much.) → Earth's climate is getting warmer.Prompt: What does warmth do to ice?
2. Which description matches a glacier? (a huge river of ice that slowly slides downhill / a big piece of ice floating in the sea after breaking off a glacier / soft ice crystals that fall from clouds / ice that covers a whole land area, like Antarctica) → a huge river of ice that slowly slides downhillPrompt: Think about where each one is found and how big it is.

Free online practice with hints and printable worksheets for this skill: eurekami.com/science/grade-2.