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How would you explain radioactivity to a child?

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This lesson explores radioactivity by describing sources of radioactivity, how it is used by scientists, and how objects become radioactive. read more

If you put your hand near a light bulb or a stove, you can feel the heat radiating from it, That is a form of radiation. I don't know if it's necessary to explain it at an atomic level to a nine year old, just a basic idea of what radiation means, and that there are different types should do for a start. read more

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