The Water Cycle

Thursday (12/02/2009)

a) Analysing our experiment.
Strange! Strange! Strange! The water is still there but lesser. Hmm…..cloudy cloudy day! The kids were a little disappointed but we would leave them for another day.

b) Questions, questions!
Yun Zhe: Teacher, look! Part of the clouds are grey. The other part are white. It will rain partly only. We laughed! So, only half of our school will get wet. However, the wind blew the dark clouds and there was no rain.
Max: Teacher, if the sun is so powerful; then the sea will get dry. Then, there should be a lot of salt……..! it’s not happening!!
Class : quiet.
Ze Yan : The sea is so big, how can it be dry?
Teacher : Hmm…..we have to find it out together!

c) Video clip: The Water Cycle
We watched the 4 important stages. It was about a raindrop that evaporated into vapour and condensed in the cold cloud. When it got colder, the water drop started precipitating and collection happened when it fell into the river again.
The kids were serious at watching the clip trying to relate.

d) Experiment: It’s raining!
We heated some water in the kettle. I held an iced bottle about the spout. Finally, upon boiling, the steam rose. That’s the vapour. And it flew to the iced bottle which was the cloud. As the cloud was cold, It got condensed and kids could see drops of water falling. Aha…….it’s like raining!
We also breathed out against the window. The kids took turn and could see their vapour on the mirror.

e) Movement and actions
We pretended to be the water drop and went through the water cycle process.