💧 Primary Maths & Science Games · Grade 3 science · Water
States of Water and the Water Cycle: Heat It, Cool It, Watch It Travel
The white “steam” from a kettle is not water vapour but tiny droplets formed as vapour cools; real vapour is invisible. Melting ice and boiling water keep taking in heat without getting hotter. Heat it once and follow the cycle once, and melting, freezing, evaporation and condensation are easy to tell apart.
- Free, no sign-up
- Ad-free play area
- Tablet friendly
- Parent mode
- A4 worksheet
- 5 levels
How to play
- Heat and cool: set the heater from deep freeze to high and press Start or Pause. The thermometer, graph, pot and particles change together. Press New block of ice to start again.
- Water cycle: set the sunshine, tick Cold weather and press Start to watch evaporation, clouds, rain or snow and rivers; the amounts always add up to the same total.
- Levels: three states, changes of state, thermometers and temperatures, water in daily life, and the order of the water cycle.
Curriculum unit
Primary science, grade 3: where water goes, boiling, freezing, melting and the three states of water, extended to the water cycle (Jiaoke science, grade 3 volume 1, unit 1).
For parents and teachers
Heat uses real values (specific heats of ice, water and vapour, 334 J/g to melt, 2260 J/g to boil at normal pressure), which is why the boiling step is much longer than the melting step. Mistakes are grouped by states, visible steam vs vapour, names of changes, thermometer reading, 0 °C and 100 °C, daily life and the cycle order.