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Comparing Light Bulbs Grade Levels: 1-4 Background We use light bulbs to see when it is dark. Many light bulbs also produce heat. It requires a lot more energy to make heat than it does to make light. Some light bulb
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Document Date: 2013-04-29 15:53:00
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Comparing Light Bulbs Grade Levels: 1-4 Background We use light bulbs to see when it is dark. Many light bulbs also produce heat. It requires a lot more energy to make heat than it does to make light. Some light bulb