4Cc.01: Explain freezing with the particle model (water freezing in the ice…
Explain freezing with the particle model (water freezing in the ice lesson).
The Cambridge Primary Science (0097) and Lower Secondary Science (0893) outcome 4Cc.01 (Stage 4, Changes to materials) for Grade 3 says: “Explain freezing with the particle model (water freezing in the ice lesson).” This Fieldbook unit teaches it hands-on, with everyday materials and a printable teacher guide and student sheet for every lesson. Official wording: Cambridge Primary Science (0097) and Lower Secondary Science (0893).
Solids, Liquids and Gases Grade 5
Where does a puddle go? Why does ice float? A first look at the tiny particles that explain the stuff around us.
- Where does a puddle go? 50–60 min
Teams race wet paper towels in still air, in wind, in a warm spot and under a cup to find out what makes water disappear faster. They catch the 'missing' water on the inside of the cup and explain evaporation with particles.
- Why does ice float? 50–60 min
Students compare water before and after freezing: same weight, but more space. They float a block of ice, measure how much sticks out, and use particles to explain why lakes freeze from the top down and fish survive the winter.
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