Presentation on theme: "Beat the heat Environmental By: Shannan Higgins and Maya Mazier"— Presentation transcript:
1Beat the heat Environmental By: Shannan Higgins and Maya Mazier Science Fair ProjectBeat the heatEnvironmentalBy: Shannan Higgins and Maya Mazier
2Statement Of ProblemDoes the greater SPF effect how long the sunscreen will protect a person from the sun’s UV rays?
3Project OverviewWe are going to apply spf 15, 30,50 and a control group( there will not be any sunscreen applied to this strip) to UV sun sense strips. We will be testing to see weather or not the spf’s strength makes it last longer. We will have several trials for each category. So, we get a more accurate answer.
4ResearchWe made sure we had all things labeled correctly (such as our independent variable, dependent variable and etc.We researched what was need of us to carry out our projectFor example what sunscreen we needed to useWe researched what type of information was needed to make the data tablesWe also created a system which had made it easier to label each individual group
5Variables The independent variable is the spf number The dependent variable is the time it takes for the sunscreen to stop working effectivelyThe constant variables are type of strip, type of sunscreen, location of strips, time strips are outside, temperature, and the amount of spf
6HypothesisIf we apply SPF 15, SPF 30, and SPF 50 to UV SUN Sense wrist bands then we will find that SPF 50 lasts the longest compared to SPF 15 and 30 because it has the strongest UV sun protection.
7Materials Sun SPF 15 Coppertone spray sunscreen Sun Wise Sun StripsTimerPaperLabels
8ProcedureFollow safety precautions such at being sure not to look at the sun directly and be sure no to get sun screen in your eyes.Gather materialsPlace UV Sun Sense wrist band face up on to the according piece of paper labeled by spf strength(for example 15 , 30 and so on)Apply spf 15, 30 ,50 and leave one band without sunscreenWait outside along side the wrist bands for fifty minuets and record the times of when the wrist bands turn from cream to purpleCalculate the amount of time it took the strips to change for each trialFind the average time for each spfAnalyze data to see which spf lasted the longest
10Data/Observations Measured in seconds Control GroupSpf 50Spf 30trials 11247406420trials 21348606060trials 31046205940Measured in secondsAfter sitting alongside spf 15 for 2hrs nothing changed!
11ConclusionWe found our hypothesis to be incorrect because we felt that spf fifty would last the longestSurprisingly spf 15 lasted longest
12Possible Experimental Errors Stopping timer to quickly.Not starting early enough in the day when UV rays are strongest.Not starting at same times in the day for each experiment trial.
13Applications and Recommendations Start at the same time during each trial.Make sure the data is organized and labeled.Make sure the data is protected from the wind.The independent variables need to stay constant during the whole experiment.For this experiment you will need more than one person.Do the experiment again with a generic brand sunscreen.For application in every day life make sure to reapply sunscreen very often when you are exposed to the sun’s UV rays.