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Boiling point
What happens when water boils?
Heat a beaker of water on a hotplate and watch the thermometer. Guess where the needle stops, then test it.
Heating & coolingOpen
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Shadow bench
Why do shadows change size?
Slide a card star between a lamp and a screen. Guess how tall its shadow will be.
How shadows formOpen
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Will the bulb light?
Which circuits make the bulb light?
Close the switch on different circuits. Predict which ones light, and fix the ones that don't.
Simple circuitsOpen