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=Discussion= In the discussion tab....respond to Mr. Scioli's prompt...What are some reason that teenagers don't use sunscreen?

=Video= Now, watch this video. Digital Media. (2007). What Are the Odds?: Skin Cancer [Full Video]. Available from http://www.discoveryeducation.com/
 * Citation (APA)**

What is Sunlight?

 * Sun is an immense nuclear reactor which admits electromatic radiation
 * Most filtered out by earths atmosphere but some gets through mainly in the ultraviolet (UV) band
 * Ultraviolet Radiation in sunlight causes cancer
 * 3 Kinds of UV Rays based on their wave length
 * 1) UVA- longest wavelengths of family and least damaging. However does cause sunburn, premature aging of skin and some cancers.
 * 2) UVB- Middle wavelength causes skin cancer and eye damage. It also causes sunburn. More dangerous than UVA
 * 3) UVC- Most dangerous of the UV Rays, it is absorbed by DNA so nearly all forms of life are irreparably damaged. Good news is that the stratispheric ozone layer absorbs all UVC, the most deadly form, and even a thin ozone layer is unlikely to let much through
 * Doesn't get to far in our bodies - effects our skin and eyes
 * Degree of intensity depends on
 * 1) //**Where you are**//
 * 2) //**What time of season**//
 * 3) //**What time of day**//

How the Sun Reacts With Our Bodies?

 * Body produces something called **//melanin//**, a dark pigment, which absorbs UV Rays and acts like a natural sunscreen
 * More UV Rays = More Melanin = Results in Tan
 * Dark Skinned People naturally produce more melanin than far skinned types and are less liable to experience sunburn or cancer


 * //Find Your Skin Type!!!!//**

Skin Type Chart 1 --- Skin Type Chart 2

Effects of Sun Damage

 * Causes Cancer
 * 1) **Basal cell carcinomas** - 80% of skin cancer cases - at first they look like small, pinkish raised areas eventually start to look like ulcers. Most common in face, ears, and neck.
 * 2) **Squamous cell carcinomas** - 10-20% of skin cancer. More dangerous than basal cell. Grow faster and can spread upon the skin and kill. Typically appear on face, ears, the top of bald head and also on hands and arms. More common in men than women. Look like sores, sometimes oozing
 * 3) **Melanomas** - 5% of skin cancer cases but 80% of skin cancer deaths. Can occur anywhere on the body. The signs are new mole, change in size, shape or color of an existing mole or freckle. **If left untreated, a malignant melanoma is usually fatal.**

Skin Cancer Photos
 * Sunburn
 * Ages skin- becomes leathery and loses softness and lustre
 * Moles and solar keratoses (slightly changed pigmentation)
 * Cataracts - cloudiness in eye, covering of capsules of lens leading to blindness

How Do We Protect Ourselves?

 * **Sunscreens**- chemical that absorbs UVR
 * SPF Rating - Sun Protection Factor - based on how long normal, unprotected skin takes to burn. On avg. 10 minutes, in theory if 15+ SPF sunscreen is applied you are able to stay in sun 150 minutes. The higner the number, the greater power to block UV Rays, thus a person can spend more time in sun with higer SPF
 * Should be applied to skin atleast 15-20 minutes prior to sun exposure
 * Reapply every 2 hours or every hour if sweating alot. Re-apply after swimming
 * Don't use sunscreens after the use-by date and don't expect them to replace sensible sun avoidance.
 * Loose fitting long sleeved shirts and long pants. Hats and sunglasses when you are out and about.
 * Use umbrella at beach or pool to help shade yourself

=Video= Click this[| Video] link and watch clip on "Skin Cancer" ABC Australia. (2005). Behind the News: Health Issues [Full Video]. Available from http://www.discoveryeducation.com/
 * Citation (APA)**

**Assessment**
Your assignment is to read article one below and answer assessment sheet. Put assignment is my drop box when you have finished. [|Article1] [|Article 2]