Lesson Planning

Teaching

• Recognise and name evaporation and condensation as changes of state.
• Design and set up a fair test to find the factors that affect the rate of evaporation.

Activities

1. Observe water changing state through a practical demonstration and use the correct scientific terms for these changes (Yrs 3&4).
2. Set up a fair test in groups to investigate the factors affecting the speed of evaporation (Yrs 3&4).
3. Either draw up a table to record the results of their investigation (Yr 4) or explain how water changes state using given scientific vocabulary appropriately (Y3).

Investigation - exploring over time, fair testing
The museum want to make a special display on water and how it can change state. Learn the elements of the Water Cycle and associated new vocabulary of evaporation, condensation and precipitation. Ask questions and set up fair tests to investigate the speed of evaporation.
Year 3 - Make predictions and with support and try to explain results in scientific terms.
Year 4 - Make predictions and explain results in scientific terms.

Vocabulary
Evaporation, condensation, condense, water vapour, invisible, liquid, change state, energy, particles