3.2.6-8.N: Plan an investigation to determine the relationships among the energy…

Hot and Cold: Particles on the Move Grade 6 · partly supports this outcome

Why tires go soft in winter, why sidewalks have gaps, and how a thermometer knows. Five lessons on what heating and cooling do to the particles in everything around us.

• Why does food colouring spread faster in hot water? 45–60 min

  Two cups, two drops, one race. Students drop food colouring into warm and ice-cold water at the same moment, then explain what the moving colour tells us about particles they can't see.

• Can you keep an ice cube frozen the longest? 60 min, plus a 40-minute wait (teach something else while the ice sits)

  A design challenge with insulation, a budget and a class leaderboard. Teams build an ice cube keeper, measure how much melted, and explain why the best designs slow down heat moving in.

Hot Stuff: Heat, Temperature and Cooling Grade 9 · partly supports this outcome

Does hotter always mean more heat? Why is sand too hot to stand on while the sea is cool? Why does a drink cool fastest at the start? How do you keep it hot? Four quantitative lessons with thermometers and a kitchen scale: Q = mcΔT, specific heat capacity, Newton's law of cooling and a drink-keeper design problem, with uncertainty throughout.

• Does hotter always mean more heat? 60–70 min

  Teams mix hot, warm and cold water in lidded foam cups, predict each final temperature from the masses, and check the prediction with a thermometer. They find that a small amount of very hot water can warm less than a large amount of warm water, and settle the difference between temperature and thermal energy with Q = mcΔT.

• Why is the sand too hot to stand on when the sea is still cool? 65–75 min

  Teams warm 200 g of dry sand or steel washers in a hot-tap-water bath, drop them into 100 g of cold water, and use an energy balance to calculate each material's specific heat capacity, with an uncertainty. They compare their values with water's 4.18 J/g·°C and explain why land heats faster than sea.

Printable practice for 3.2.6-8.N

These pages practise a closely related idea; the match to 3.2.6-8.N is partial.

• Hot and Cold: Particles on the Move workbook included with the unit

  2 English-support pages, 1 reading, 1 unit review, 1 unit test, with answer keys.

• Hot Stuff: Heat, Temperature and Cooling workbook included with the unit

  3 practice pages, 3 readings, 1 word wall, 1 unit review, 1 unit test, with answer keys.

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