3.3 UV Exposure Lab Worksheet (1)
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Saint Joseph's University *
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Jan 9, 2024
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Anatomy & Physiology A
3.3 Assignment: UV Exposure Lab Lab Objectives
In this lab you will be examining the relationship between latitude, UV exposure, the integumentary system, and overall health. 1. Location:
1.
Visit the GPS Coordinates website
and search for your location. You can use a specific address or the name of a location (i.e. the name of your school). Record
the name, approximate latitude (round to the nearest hundredth perhaps), and approximate longitude below
. *Make sure to include a negative sign if the value is negative.
Location: Saint Joseph High School
Latitude: 42.09
Longitude: -86.49
2.
Collect the same data for Key West, Florida – which lies at the southernmost tip of FL.
Location: Key West, FL
Latitude: 24.55
Longitude: -81.79
2. Pre-lab Questions:
1.
Form a hypothesis:
“If you live in a lower
latitude, then you will be exposed to more UVB radiation and
will synthesize more vitamin D.”
2.
Form a second hypothesis:
“If it is summer
, then you will be exposed to more UVB radiation and will synthesize more vitamin D.”
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Last Updated on
5/24/2022
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3. UV Index:
1.
The ozone layer and seasonal weather shield the earth’s surface from most solar
radiation. Collect data on the mean UV Index for your approximate location
via the National Weather Service archived data website
, the EPA.gov website
, or here
. This index represents the average amount of radiation that reaches the earth’s surface at a given time. You should round your data up to the nearest whole number.
Month
Jan
Feb
Mar
Apr
May
June
July
Aug
Sep
Oct
Nov
Dec
UV Index
2
2
2
3
5
6
6
6
4
2
2
1
2.
Collect the same data on the mean UV Index for the southernmost tip of Florida
.
Month
Jan
Feb
Mar
Apr
May
June
July
Aug
Sep
Oct
Nov
Dec
UV Index
6
8
10
11
11
11
11
11
10
9
7
6
4. UV Exposure Time:
1.
Visit the UV Exposure Time Data
and collect the data as outlined below for MI and for FL given your skin type
. This data will give the approximate minimum time needed to be spent outside (with face, hands, and arms exposed) to maintain healthy vitamin D levels.
Exposure Time
MI
Key West, FL
Min. Exposure Time (minutes) for March
16
7
Min. Exposure Time (minutes) for June
4
3
Min. Exposure Time (minutes) for September
9
5
Min. Exposure Time (minutes) for December
12
5
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Last Updated on
5/24/2022
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5. Graph:
1.
Create a graph of Location and Minimum UV Exposure Time from the data above. At a minimum, your graph should include a title, appropriate data, and labeled X and Y axis with units.
*You may create this graph in digital format via Word or Excel or draw by hand.
6. Post-lab Questions:
1.
During what month was the minimum exposure time to produce an adequate amount of vitamin D the highest for your area? The lowest? The month that minimum exposure time was highest in Saint Joseph, MI was in March and the Lowest was in June. 2.
Revisit your first hypothesis. Were you correct? What did the lab show you about
the relationship between latitude and time needed to synthesize adequate vitamin D levels? Yes I was correct, I had said I thought that if you live in a lower latitude, then you will be exposed to more UVB radiation and will synthesize more
vitamin D. 3.
Revisit your second hypothesis. Were you correct? What did the lab show you about the relationship between UV exposure (seasonal) and the time needed to synthesize adequate vitamin D levels? Yes I was I said I thought that If it is summer, then you will be exposed to more UVB radiation and will synthesize more vitamin D. 4.
Describe 3 factors that may make it easier to meet these minimum time requirements in your area during the summer months or in lower latitudes, but more difficult in the winter months or in higher latitudes (consider weather, clothing, activities, etc.). Because it's warmer in the summer, more people go ©2022 Michigan Virtual
Last Updated on
5/24/2022
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outside because of activities like sports, walks, and going to the beach (in my area). People also wear less clothing in the summer because of the warmer weather. In the winter it's colder so people will stay inside more and wear more clothing to keep warm. 5.
Many foods are supplemented with vitamin D to aid those who do not get enough
UV exposure to synthesize it themselves. Visit the US Department of Health and Human Services website
and list 3 foods that you consume that help supplement
your diet with vitamin D. Fish, Egg yolks, and red meat ©2022 Michigan Virtual
Last Updated on
5/24/2022
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