Science+fair+project+id


 * My science fair project is about the most effective sunscreen

My hypothessis is that the SPF is the most effective sunscreen.

Notes:

Source 1

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I think that its a good source because it tells good facts, and because its not made by a student.


 * The SPF is an imperfect measure of skin damage because invisible damage and skin aging are also caused by [|ultraviolet] type A (UVA, wavelength 320 to 400 [|nm] ), which does not cause reddening or pain.
 * The higher the SPF, the more protection a sunscreen offers against UV-B (the ultraviolet radiation that causes [|sunburn] ). [|[2]].
 * In the 2007 and 2011 draft rules, the [|Food and Drug Administration] (FDA) proposed a maximum SPF label of 50, to limit unrealistic claims. [|[25]][|[26]].
 * The SPF can be measured by applying sunscreen to the skin of a volunteer and measuring how long it takes before sunburn occurs when exposed to an artificial sunlight
 * The use of broad-spectrum (UVA/UVB) sunscreens can address this concern. Diligent use of sunscreen can also slow or temporarily prevent the development of wrinkles and sagging skin. [|[5]].

Source 2

[] exets answer your questions on this website


 * Higher SPF's aren't always necessary. You need to look at a couple of things when you are shopping for sunscreen.
 * First, how light is your skin tone? Those with lighter skin will usually burn faster than those with darker or olive skin.
 * Because you want to be safe from the sun, I'd recommend applying every 1-2 hours, no matter the SPF.
 * Perfect conditions mean that you aren't in water or sweating, two things that usually go hand in hand with the sun. This also doesn't reflect sunscreen that can rub off from your clothing.
 * If your skin starts to turn red fast, you'll want a higher SPF.

Source 3

[] This is a good website because doctors tells most people to go here.

Sunscreens with higher SPF ratings block slightly more UVB rays, but none offers 100% protection.
 * The SPF rating is a measure of the time it would take you to sunburn if you were not wearing sunscreen as opposed to the time it would take with sunscreen on.
 * SPF is not a consumer-friendly number," says Florida dermatologist James M. Spencer, MD. "It is logical for someone to think that an SPF of 30 is twice as good as an SPF of 15 and so on. But that is not how it works."
 * According to Spencer, an SPF 15 product blocks about 94% of UVB rays; an SPF 30 product blocks 97% of UVB rays; and an SPF 45 product blocks about 98% of rays.
 * Spencer recommends SPF 30 products to his patients.

Source 4

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This website is good because,This article is the archived version of a report that appe.ared in [|July 2009 Consumer Reports magazine] > UVB rays are accounted for in the sun-protection factor.) We also checked how well sunscreens lasted on a panel of volunteers who soaked in a tub of water for at least 40 minutes. > Banana Boat Kids Tear Free SPF 50, was just fair in UVA protection. It also took an especially long time to rub in and left a sticky, white residue. > Choose a sunscreen labeled very water resistant or waterproof and with an SPF of at least 30, which is plenty for most people. In fact, the Food and Drug Administration has announced plans for a new labeling rule that would stop SPF numbers at 50. > Sunscreens that could prove more protection could be labeled 50 > >  High-rated products from our 2007 tests that are still being sold include Blue Lizard Regular Australian SPF 30+, Mustella Bébé/Enfant High Protection SPF 50, Lancôme Paris Sôleil Ultra Expert Sun Care for Sensitive Skin SPF 50, and Fallene Cotz SPF 58.
 * All sunscreens except Aveeno's Continuous Protection Spray SPF 45 lost some UVB protection after water immersion, but none lost more than 10 percent.
 * Past tests have shown that different formulas or SPFs within the same brand may not rate the same.

Source 5 Textedbook



= = "Consumer Reports Magazine: July 2009." //Best Sunscreen: Consumer Reports Tests Sunscreen //. Consumer Report, n.d. Web. 26 Sept. 2013. <http://www.consumerreports.org/cro/magazine-archive/july-2009/home-garden/sunscreens/overview/sunscreens-ov.htm>.
 * <span style="background-color: #ffffff; font-family: Arial,Helvetica,sans-serif; font-size: 12px;">Works Cited **
 * <span style="font-family: 'Times New Roman',Times,serif; font-size: 16px; font-weight: normal; line-height: 1.5;">This article is the archived version of a report that appe.ared in July 2009 Consumer Reports magazine.

<span style="background-color: #ffffff; display: block; font-family: 'Times New Roman',Times,serif; font-size: 16px;">High SPF Sunscreens: Are They Better?" //WebMD//. WebMD, n.d. Web. 26 Sept. 2013. <http://www.webmd.com/beauty/sun/high-spf-sunscreens-are-they-better>.
 * <span style="font-family: 'Times New Roman',Times,serif; font-size: 16px; line-height: 1.5;">I know i's a good website because doctor recommend this website.

<span style="background-color: #ffffff; font-family: 'Times New Roman',Times,serif; font-size: 16px;">Jen Adkins, Adkins. "Is <span style="background-color: #ffffff; font-family: 'Times New Roman',Times,serif; font-size: 16px;">a Higher SPF Level the Best Option in Sunscreen?" //<span style="background-color: #ffffff; font-family: 'Times New Roman',Times,serif; font-size: 16px;">About.com Skin Care //<span style="background-color: #ffffff; font-family: 'Times New Roman',Times,serif; font-size: 16px;">. N.p., n.d. Web. 03 Oct. 2013. <http://skincare.about.com/od/sunkissedglow/f/SPFratings.htm>. <span style="background-color: #ffffff; display: block; font-family: 'Times New Roman',Times,serif; font-size: 16px;">
 * Exets answer your questions on this website.

<span style="background-color: #ffffff; font-family: 'Times New Roman',Times,serif; font-size: 16px;">Moyer, Richard. "What Types of Cells Are You Made up of ?" //<span style="background-color: #ffffff; font-family: 'Times New Roman',Times,serif; font-size: 16px;">McGraw-Hill Science //<span style="background-color: #ffffff; font-family: 'Times New Roman',Times,serif; font-size: 16px;">. New York: McGraw-Hill School Division, 2000. 103-04. Print.
 * Its a good website because its from a science textbook.

<span style="background-color: #ffffff; display: block; font-family: 'Times New Roman',Times,serif; font-size: 16px;"><span style="background-color: #ffffff; display: block; font-family: 'Times New Roman',Times,serif; font-size: 16px;"> <span style="background-color: #ffffff; font-family: 'Times New Roman',Times,serif; font-size: 16px;">Sunscreen." //<span style="background-color: #ffffff; font-family: 'Times New Roman',Times,serif; font-size: 16px;">Wikipedia //<span style="background-color: #ffffff; font-family: 'Times New Roman',Times,serif; font-size: 16px;">. Wikimedia Foundation, 09 Sept. 2013. Web. 26 Sept. 2013. <http://en.wikipedia.org/wiki/Sunscreen>.
 * I think that its a good source because it tells good facts, and because its not made by a student.

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