Three Phases of Water
Explain the three phases of water by showing ICE, WATER and WATER VAPOUR out of a steaming kettle. Explain terms like melting and boiling.
Take 3 glases of water: 1 hot water, 1 tap water and 1 ice cold water.
Drop food colourant into the three glases. Let the learners watch the different times the water takes to colour because of the temperature difference.
Let the learners notice the condensation of the water at different places on the glass. Water will condensate inside the glass of the hot water and outside the glass of the cold water.
Invert a jar of red coloured hot water on top of a jar of blue coloured cold water.
Let the learners see that the water in the two jars doesn’t mix. The reason being that the cold water is more dense than the hot water. Once the temperature difference decrease in the two jars, the water will start to mix.
Do the experiment the other way round; hot water in the bottom jar and cold water on top; the water will mix immediately. Explain the water cycle by showing the learners the following “ziplock” bag. I the bag is in the sun for a while, water droplets will condensate on the inside of the bag.
Put some soil in the bottom of the bag. Fill a third with water. Draw the rest of the picture with a permanent marker on the outside of the plastic bag.