UV Radiation Protection

Now that you know the positives and negatives that UV radiation has on your health, here are some ways to protect yourself. To protect your eyes, wear sunglasses. Sunglasses these days have 100% UV protection and get sunglasses with side protection too.
Use sunscreen to protect your skin. Use a least SPF 15 sunscreen, and sunscreen that is waterproof and blocks out both UV-A and UV-B is the best choice. Wear clothing that has light colors because dark colors, like black, attract the UV rays. Hats are also a good option too. Also, avoid over exposure, the highest amounts of UV radiation happen between 10 and 2. Shaded areas do help, but they do receive UV radiation. Artificial UV tanning is another thing to avoid along with spray tans. They don't look natural and they don't come with the benefits that the actual Sun does. The perfect amount of sunlight is 15 minutes per day.

UV Radiation and its Heath Affects

UV Radiation is short waved electromagnetic light. It's very high in energy, but it's not visible. The main source of UV radiation is the Sun. There are three types of UV radiation; UV-A, UV-B, and UV-C. UV-C has the highest energy level, longest wave length and is blocked out by the Ozone. UV-B has the second highest energy level and second shortest wave length. Also, it is partially blocked out by the Ozone. UV-A radiation is the most common radiation to us. It has the shortest wave length and the lowest energy level. Only a small amount of UV-A is blocked out by the Ozone. With UV radiation comes a lot of health benefits and dangers. The dangers include skin damage, eye damage, immune system and DNA damage. Skin damages include Skin Cancer and early aging and wrinkles. In fact, 1 out of every 5 adults who spend a lot of time with direct UV radiation will develop Basal Cell, Squamous Cell, or Malignant Melanoma. Basal Cell is the the most common and easiest to cure. Squamous Cell is treatable, but Melanoma is the deadliest. Eye Damage includes Cataracts, cloudiness of the eye, and Macular Degeneration, loss of central vision. Both are preventable, but Cataracts are treatable but Macular Degeneration is not. Health benefits include Melanin production and Vitamin D production. Melanin is a dark skin pigmentation, which helps block UV radiation from your skin. Vitamin D is important because it carries calcium throughout our bodies.

Ozone Layer

When the Ozone layer we have now was created, Oxygen wasn't in its pure state, but it did exist. The Ozone layer forms by having sunlight and heat reach an Oxygen molecule in the upper atmosphere. Because of the heat and light, the bond of the molecule breaks. The single Oxygen atom will combine with an Oxygen molecule to create our Ozone. The Ozone then absorbs UV radiation from the Sun and turns it into heat. Then the process starts all over again, our Ozone is continuously reforming. The Ozone is important to modern life because it allows us to live on the earth. The Ozone absorbs and blocks out harmful radiation like Gamma, X-Ray, and some UV.

After the Giant Impact.

After the Giant Impact, earth had no atmosphere. On the land, volcanic eruptions created gas. Also, due to a large amount of asteroid and comet collisions, ice has been formed. This ice has combined with the gas that the eruptions created. 4.2 billions years ago, our oceans began forming. As the earth cooled, due to the ice, clouds formed in the sky. These clouds then created rain, which created our oceans. This put water vapor in our atmosphere. Our atmosphere contained Water Vapor, Nitrogen, and Carbon Dioxide, among other gases.

Earth's fomation and early stages

The first earth was created from a cloud of dust and gas, mainly hydrogen and helium. 4.6 billion years ago our earth was a proto-planet. Also, since it was in a molten state, the metals of earth sank to the core. The giant impact happened about 4.5 billion years ago. According to the theory, a mars sized proto- planet collided with earth, destroying the atmosphere it had. When the proto-planet collided with earth, particles flew off, which created our moon. This also is thought to be a reason why our earth is tilted.