Energy
Energy
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Why is fire hot?
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Why do I sometimes get a 'shock' from touching the doorknob?
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Why do balls bounce?
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How do matches work?
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Why does wood burn?
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Why do candles burn out?
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How do light bulbs work?
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Why should I unplug appliances when I'm not using them?
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What is electricity?
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What is friction?
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How do batteries work?
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How does a glow stick work?
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What is a calorie?
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How do fireworks work?
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Where does petroleum come from?
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What are fossil fuels?
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Why do we slip?
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Why do dark colors absorb heat?
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What is energy?