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Research and Reflection

Research and Reflection. The Effects the Sun has on Your Skin. Questions I Asked. How does sunscreen work ? Why do people with fair skin burn more easily than people with darker skin? How do we get Vitamin D from the Sun, and how much should we get?.

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Research and Reflection

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  1. Research and Reflection The Effects the Sun has on Your Skin

  2. Questions I Asked • How does sunscreen work ? • Why do people with fair skin burn more easily than people with darker skin? • How do we get Vitamin D from the Sun, and how much should we get?

  3. How did I find the answers to my questions? • I searched keywords on Google.com, such as “sunscreen”, “melanin” and “vitamin D” • I chose to read reliable sources (not .com, only .edu, .org, or .gov) • I took notes and found answers

  4. Question #1: How does Sunscreen work? “Chemically-based” sunscreen absorbs UV light, scatters rays to reduce harmful effects. “Physically-based” sunscreen reflects UV rays. The best sunscreen shields against UV-B radiation (causes sunburn) and UV-A radiation (causes long-term damage).

  5. Use a sunscreen with a high SPF (skin protection factors) frequently (reapply every two hours outside) and thoroughly (teaspoon for face, tablespoon for each limb)

  6. Question #2: Why do people with fair skin burn more easily than people with darker skin? • Fair skin has less melanin in it. • What is melanin? • The pigment in your skin, the darker you are, the more you have. • It provides some protection from damaging UV rays. • Therefore, with little melanin, you are less protected from the Sun.

  7. This does not mean that people with darker skin should not protect their skin! Too much sun exposure can damage anyone’s skin.

  8. Question #3: How do we get Vitamin D from the Sun, and how much do we need? • When we are exposed to UV rays, your body produces Vitamin D. • 10-15 minutes of sunlight exposure a day will provide you with the daily recommendation of Vitamin D. • You can also get Vitamin D by eating/drinking milk, fatty fish, fish oil, or Vitamin D supplements.

  9. In conclusion, a small amount of direct sunlight is beneficial to your skin and your health, but a large amount of it can be harmful.

  10. My Resources • About, Inc. 2006 “Vitamin D: What is it, and what are some sources?” http://ibdcrohns.about.com/od/relatedconditions/a/fdavit d.htm • CI&A Publications. 5/2/06 “Intermediate Level Science”. http://www.emsc.nysed.gov/ciai/pub/pubsci.html • MayoClinic. 07/06 “SkinCancer” http://www.mayoclinic.com/health/skin- cancer/DS00190/DSECTION=4 • National Cancer Institute. 4/21/05 “Skin Cancer Treatment” http://www.nci.nih.gov/cancertopics/pdq/treatment/skin/ patient

  11. More Resources I Used • National Institute of Health. 8/5/05 “Dietary Supplement Fact Sheet: Vitamin D”. http://dietary- supplements.info.nih.gov/fa ctsheets/vitamind.asp • “Sunscreen”. September 2006 http://en.wikipedia.org/wiki/Sunscreen • The University of the State of New York. “Learning Standards for Mathematics, Science, and Technology” March 1996.

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