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Transcript of Sunlight
Facts - Sunlight is the total spectrum of electromagnetic radiation given off by the sun.
- The visible part of the sun is roughly 10,000 degrees F.
-Temperatures in the core reach more than 27million degrees F.
- Sunlight is filtered through the Earth's atmosphere.
-Sunlight takes about 8.3 minutes to reach Earth
Causes... Skin Cancer - UV radiation causes damage to the DNA of cell, & creates mutation in the genes.
- Most skin cancer appears after age 50, but the sun damages the skin from an early age.
- The most common warning sign of skin cancer is the change in the appearance of the skin, such as a new growth or a sore that will not heal.
- Melanoma is less common than non-melanoma skin cancers, but it's more serious.
- Non-melanoma is generally curable. Skin Aging - Results of spending too much time in the sun. Wrinkles, age spots, shingles, & tanning are common effects. UVA rays penetrate deep into the layer of skin known as the elastic layer, It's weakened by receiving too much UV light. Sunburn Caused by an over exposure to the sun. Reactions are .. tenderness, pain, swelling, blistering, fever & chills. There is no cure for this, wet compresses, cool tub baths & smoothing lotions may be helpful. - Skin Cancer
- Skin Aging
- Cataracts & Eye Damage
- Heat Stroke & Dehydration
- Acne Types of UV Radiation UVA is the most common on Earth, an is harmful to the skin.
UVB is less common , it's less harmful than UVA but can cause the most damage.
UVC is the least dangerous because although it can cause the most damage to the skin , almost all the UVC ray are absorbed by the ozone layer. Cataracts & Eye Damage - Caused by an exposure to UV rays. Cataracts causes a loss of clearness in the lens of the eye & clouds vision if it's not treated, it's possible to lose eye sight completely. Heat Stroke & Dehydration If a person is over exposed to the sun & doesn't take fluids, the body will lose salts like sodium, potassium, calcium, bicarbonate, & phosphate. Acne Sun light increases oil production & causes breakouts. Geographic Location UV levels are greater in tropical areas near the equator. The farther you are from the equator, the smaller your risk. Sources www.sciencelearn.org