Manipulative: Amount of time sunscreen is exposed to heat.
The Electromagnetic Spectrum
From top to bottom, the scale reads: Aircraft and Shipping Bands, AM Radio, Shortwave Radio, TV and FM Radio, Microwave Radar, Infrared Light, Visible, UV Light, X Rays, and Gamma-rays. As you can see, visable light is only a small part of it.
The Sun in UV Light
This is an image of the sun in UV light. Blue indicates UV light.
Ozone Depletion Affects UV Light
This diagram shows how UVA and sometimes UVB light shines through holes in the ozone caused by pollution. The red rays contain UV light. The light blue rays show pollution. As the light blue rays deplete the ozone layer, the UV rays are able to get in.
This is what I used to measure my data. Please keep in mind that it prints darker than it may appear on your screen.
Another Wordle!
1 Day of Heat
Smooth, glossy finish.
2 Days of Heat
Small section of shallow separations running across sunscreen in upper righthand corner.
3 Days of Heat
Larger section of separations in top corner and multiple cracks running along the middle. Oily cover on top layer of sunscreen visible.
4 Days of Heat
Two medium sections of separating cracks covering almost the entire top layer. Oily sheen is still visible.
5 Days of Heat
More cracks, except instead of many small separations there seem to be fewer separations that are larger. Oily sheen only visible in separated areas.
6 Days of Heat
Top sections are fully separated in many places and separations are both large and numerous. Sunscreen still has an oily sheen.
7 Days of Heat
Very similar to 6 but it also has a slight tint of yellow as well as dull covering. A little fewer cracks.
8 Days of Heat
Light yellow glaze and completely covered with separations leaving sunscreen with an almost jelly-like texture.
Application
Sunscreen is very important for everyone to wear. If you don’t apply it, it can cause serious forms of cancer, harsh sunburns, and wrinkles. If your sunscreen doesn’t work, the results could be even worse. People commonly leave it in their car or in the sun, and now they know that its effectiveness can be reduced over time. This experiment is important because it shows how sensitive sunscreen can be in heat and its serious consequences. Suggested solutions for this problem would be to store all sunscreen indoors, not leave it in the car, and try to keep all sunscreen at room temperature for better results and a healthier lifestyle.