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Designing an Experiment, Biology Presentation
Transcript of Designing an Experiment, Biology Presentation
Nikita Aleksandr Sormunen
Do Tanning Beds Cause Skin Cancer?
1. Independent Variable(s)
2. Dependent Variable
3. Controlled Variable(s)
An estimated 30 million customer base in the U.S.A.
Nearly 18 % of females use services provided by tanning salons.
6.3 % of males use the same services.
Tanning beds emit UV radiation in forms of UVA and UVB.
Fluorescent lamps used.
Tanning beds have different tanning levels.
Tanning beds tend to be either high or low pressure.
Exposure kept constant
Cause of skin cancer
Acceleration of skin aging
Mutation of DNA
Weakens the immune system
The amount of time under exposure of UV radiation in tanning beds
The strength of the UV radiation
-The amount of UVA radiation in ratio to UVB radiation
The quality of the salon (price=quality)
The amount of individuals which develop some sort of skin defects including the extremes: different types of skin cancer.
Amount of time spent exposed to UV radiation in tanning beds.
Regularity of tanning bed usage.
Time spent exposed to sunlight when not in tanning bed.
Selection of three groups
Group 1: go to expensive salons, 2: go to cheap salons, 3: don't use services of tanning salons.
Groups 1 and 2 spend the same amount of time exposed to UV radiation.
The experiment is set over the course of 1 year.
Regularly the participants are asked to be checked for skin disease.
THANK YOU VERY MUCH!
Difficulties keeping track of participants' actions.
People might not be willing to contribute to the studies.
Different participants have different skin. Some more sensitive, some more enduring.
The amount of melanin in the epidermis.