Ozone Layer
On a bright, cool day, most people perceive the sun's rays as feeling good on their skin. By nature, many of us even make an effort to stay out in the sun to bronze our bodies. The sun is 93 million miles away from the Earth and its energy travels to us in moving waves called radiation. That energy takes the form of heat, light, and other energy as well.
Visible sunlight allows us to see the world around us. But there is invisible sunlight as well. These rays can not be seen. Some can be felt as heat, but the ones that can't be felt are called ultraviolet rays. These are the culprits that cause changes to happen to our skin, like wrinkles, tans and even cancer. When a person wears sunscreen, they are protecting themselves from these ultraviolet rays.
A protective blanket of gases, the atmosphere, surrounds our planet. It provides us with the air we breathe, and it protects us from the full blast of the sun's radiation. Way up in the part of the atmosphere, called the......
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