The weather is warming up, the days are longer and there's more time to be outside doing all kinds of fun things!
But if you're going to be out in the sun, especially on a hot day, you need to stay safe. Let's find out how.
Even though the sun is hot, it does cool things. It keeps us warm. It makes flowers and plants grow. It even gives us vitamin D so we can better absorb calcium into our bodies for strong bones.
It does all these things by sending down light, which includes invisible ultraviolet (say: ul-trah-VYE-uh-lit) rays. These are also called UV rays. Some ultraviolet rays pass through air and clouds and penetrate the skin. When your skin's been exposed to too many of these rays, you get what's known as a sunburn. Ouch!
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