Now that we have a clear understand on what SPF is and how sunscreen works, it is time to do my experiment. In order to conduct my experiment, I needed to obtain the following materials.
4 bottles of Neutrogena Sunscreen ( SPF 45, SPF 55, SPF 70, SPF 100)
A box of ziplock bags
Sharpie (To mark the plastic bags)
Plastic spoons (To help spread the sunscreen on the plastic bags)
UV Beads
String
UV Index
Once I gathered all of these materials, I cut 5 pieces of string and then opened the UV beads. Then I started to put the beads onto each string, I put exactly 17 beads on each of the 5 strings to make my results as accurate as possible. After I finished putting the beads on the string, I got 5 ziplock bags and put the strung beads inside each bag. …show more content…
The results were very interesting, the control group (Figure 1), which did not have sunscreen, contained 13 out of 17 beads that were different shades of purple. This meant that approximately 76% of the total amount of beads were exposed to extreme or high amounts UV rays. The other 24% or 4 beads, were different shades of blue, which meant that the beads were exposed to very low amounts of UV rays. The next ziplock I checked was the one with 45 SPF, the sunscreen with the lowest value of SPF that I bought. The results were quite hard to see with this one, because the shade of the each color was faded as you can in Figure 2. Around 11 beads were different shades of pink and purple which meant that approximately 65% of the beads had been exposed to extreme amounts of UV rays. The remaining 35% or 6 were different shades of yellow which meant that they had been exposed to moderate amounts of UV rays. Next, I checked the ziplock bag that contained the sunscreen with 55 SPF protection (Figure 3). Around 9 out of 17 or 53% of the beads were different shades of purple and pink which meant they had been exposed to extreme amounts of UV rays. Also around 6 out of 17 or 35% were shades of yellow. The remaining 2 beads were white which meant that they were exposed to no UV …show more content…
My results show that my hypothesis which is, SPF protection does not affect the amount of UV rays that hit your skin, was incorrect. This is because the sunscreens with higher SPF did better than the ones with lower SPF. According to my results the best sunscreen to buy would the one with 70 SPF because it block most of the extreme UV rays, even though the SPF 100 may have blocked all of the UV rays for 8 beads it left 9 beads with extreme UV rays exposure. It is important to notice that nobody is 100% protected from UV rays even though we use sunscreen, but we can still lower the exposure by using the right
4 bottles of Neutrogena Sunscreen ( SPF 45, SPF 55, SPF 70, SPF 100)
A box of ziplock bags
Sharpie (To mark the plastic bags)
Plastic spoons (To help spread the sunscreen on the plastic bags)
UV Beads
String
UV Index
Once I gathered all of these materials, I cut 5 pieces of string and then opened the UV beads. Then I started to put the beads onto each string, I put exactly 17 beads on each of the 5 strings to make my results as accurate as possible. After I finished putting the beads on the string, I got 5 ziplock bags and put the strung beads inside each bag. …show more content…
The results were very interesting, the control group (Figure 1), which did not have sunscreen, contained 13 out of 17 beads that were different shades of purple. This meant that approximately 76% of the total amount of beads were exposed to extreme or high amounts UV rays. The other 24% or 4 beads, were different shades of blue, which meant that the beads were exposed to very low amounts of UV rays. The next ziplock I checked was the one with 45 SPF, the sunscreen with the lowest value of SPF that I bought. The results were quite hard to see with this one, because the shade of the each color was faded as you can in Figure 2. Around 11 beads were different shades of pink and purple which meant that approximately 65% of the beads had been exposed to extreme amounts of UV rays. The remaining 35% or 6 were different shades of yellow which meant that they had been exposed to moderate amounts of UV rays. Next, I checked the ziplock bag that contained the sunscreen with 55 SPF protection (Figure 3). Around 9 out of 17 or 53% of the beads were different shades of purple and pink which meant they had been exposed to extreme amounts of UV rays. Also around 6 out of 17 or 35% were shades of yellow. The remaining 2 beads were white which meant that they were exposed to no UV …show more content…
My results show that my hypothesis which is, SPF protection does not affect the amount of UV rays that hit your skin, was incorrect. This is because the sunscreens with higher SPF did better than the ones with lower SPF. According to my results the best sunscreen to buy would the one with 70 SPF because it block most of the extreme UV rays, even though the SPF 100 may have blocked all of the UV rays for 8 beads it left 9 beads with extreme UV rays exposure. It is important to notice that nobody is 100% protected from UV rays even though we use sunscreen, but we can still lower the exposure by using the right