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Prezi for 8th grade STEM class about the chemistry of sunscreen.

Ipsika Kumar

on 20 May 2015

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Transcript of Sunscreen

The Chemistry of Sunscreen
The combination zinc oxide and or titanium dioxide creates a mixture of chemicals, known as sunscreen,according to Anne Marie Helmenstine, Ph.D. who is a certified Chemistry Expert. Other chemicals are used as well, which are really important. Some of these really important chemicals include of: Octinoxate, Oxybenzone, Homosalate, Octisalate, Octocrylene, Avobenzone, and Mexoryl SX.

What is this "UV" radiation, that we need to stay mindful of?
UV radiation or ultraviolet radiation is a powerful emission, which is really harmful for the skin. There are two types of UV radiation that can reach the Earth's surface, according to A Division of Evans Analytical Group. The first type is, UV-A, varies from 320-400 nm and the second type is UV-B, that varies from 290-320 nm. UV-A does less harm compared to UV-B. UV-A burns the skin (the top layers), that we learned to call a "sunburn." Whilst, UV-B damages the skins inner layers more deeply, has a likely chance to destroy the dermis, harms the immune system, and alter with the skin's DNA. By wearing sunscreen, it is proven to be less common to be harmed by the sun's harmful UV rays.
What does "SPF" mean?
Who created sunscreen?
Rumor about sunscreen revealed...

Dark skin...light skin...in the middle skin...we all need sunscreen. The myth of only light skin people need sunscreen, is a lie. Every race, ethnicity, gender, and SKIN COLOR need sunscreen, because it protects them from the radiation. Even though, it is true that darker skinned people are more protected from the sun, however it doesn't mean that they are immune from the sun. It is important to realize that the harm the sun is putting on your skin might not be prominent or obvious, nervelessness, it is still there.
How Does Sunscreen Work?
Summer is around the corner, because of this, the weather is warmer and the sun is shinier. Sunscreen is being applied...

Sunscreen is designed to help us stay safe, and protect us from the Sun's harmful UV radiation.
Sunscreen is a combination of organic and inorganic chemicals, which work together to create a blockade or a "filter" for the light from the sun.

What chemicals are included in Sunscreen?
This is a common question asked by many sunscreen buyers, and everyday people. SPF is written on sunscreen bottles, some of them have higher numbers and some have low. But we take the one with the lower SPF value, because it costs cheaper. However, this factor determines a lot then "just sunscreen." To start with, SPF stands for Sun Protection Factor. This demonstrates the measure of how much UV radiation it takes to burn your skin. For example, if my sunscreen bottle's SPF factor says, "SPF 30" and my friend's sunscreen bottle's SPF factor says, "SPF 15." I would know that my sunscreen is stronger and more protective from the harmful radiation, and most likely use mine.
Many people were recorded to be the first inventor of sunscreen. Milton Blake, a chemist, from Australia, was the first ever recognized to be the creator of this substance. He created it in his kitchen, later producing it in Hamilton Laboratories, in the 1930s. However, this cream wasn't effective. Six years after, Eugene Schueller, the founder of L'oreal Cosmetics, a chemist, created a similar cream which, also, didn't work. But, Franz Greiter, a scientist from Australia, came out with his Glacier Cream, in 1936, which was rumored to be the first functional sunscreen. Years after, in 1962, Franz Grieter, introduced, the Sun Protection Factor (SPF).
zinc oxide: an insoluble white solid used as a pigment and in medicinal ointments.

titanium dioxide: a white nonreactive solid that occurs naturally as the mineral rutile and is used extensively as a white pigment.
SPF: SPF stands for Sun Protection Factor. SPF numbers on a package can range from as low as 2 to as high as 100. These numbers refer to the product's ability to screen or block out the sun's burning rays.
UV (ultraviolet) Radiation: Radiation in the part of the electromagnetic spectrum where wavelengths are just shorter than those of ordinary, visible violet light but longer than those of x-rays.

Helmenstine, P. (n.d.). "How Sunscreen Works and What SPF Means". Retrieved May 17, 2015,

"News". (n.d.). Retrieved May 18, 2015,

"Who Invented Sunscreen". (n.d.). Retrieved May 18, 2015,

(n.d.). May 18, 2015, from http://dictionary.reference.com/

Pictures for
"What chemicals are included in Sunscreen?"
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How Does Sunscreen Work?
*the chemicals create a blockade or a
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What does "SPF" mean?
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Who created sunscreen?
Eugene Schueller
Milton Blake
Franz Grieter
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What is this "UV" radiation, that we need to stay mindful of?
Pictures for
Rumor about sunscreen revealed...
It doesn't matter who you are...we all need sunscreen!!!!
By: Ipsika Kumar

The Trouble With Sunscreen Chemicals | EWG's 2015 Guide to Sunscreens. (n.d.). Retrieved May 19, 2015, from http://www.ewg.org/2015sunscreen/report/the-trouble-with-sunscreen-chemicals/

Rudis, J. (n.d.). True or False: Dark-skinned People Don't Need Sunscreen. Retrieved May 19, 2015, from http://www.lifescript.com/health/centers/skin_cancer/tips/true_or_false_dark skinned_people_dont_need_sunscreen.aspx

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