When you turn on the hot water in the bathroom, do you ever wonder how the hot water got upstairs when the source of heat for warming the water is downstairs?
The reason is that hot water rises -a fact which heating engineers and plumbers make use of. A simple experiment will provide proof enough.
Fill a milk bottle with cold water and cover the top with a square of cardboard. Fill a second milk bottle with hot water to which some ink has been added. Both bottles should be filled to the brim.
Carefully upturn the bottle containing the cold water, holding the square of cardboard across the neck as a simple cork. Position it immediately above the bottle containing the hot water.
Holding both bottles steady, slip the piece of card out from between
them and watch what happens. The colored hot water will rise up into the bottle
containing the cold water, while the cold water will sink into the lower
Children learn best through doing
Before children can understand a thing, they need experience: seeing, touching, hearing, tasting, smelling; choosing, arranging, putting things together, taking things apart. Experimenting with real things.
Old-time school teaching used only words and the teachers thought children knew something if they could repeat it. Now we know better. To reach practical understanding we do not need to use many words with young children.
Children are clever. They learn a lot, without being taught. The greatest skill - to be able to talk, to communicate is learnt outside school. In the classroom it's the children who need to talk the most. Unfortunately it is the teacher who does most of the talking!
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