. Stella thinks that if people are exposed to ultraviolet light then they are more likely to get skin cancer. Stella designs an experiment where in sample A consisted of people who were exposed to ultraviolet light and sample B consisted of people who were not. Control Group-

Independent variable –

Dependent variable – Skin cancer

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a plasma is a warm ionized gasoline consisting of approximately equal numbers of definitely charged ions and negatively charged electrons. the characteristics of plasmas are notably unique from the ones of ordinary neutral gases in order that plasmas are considered a awesome "fourth kingdom of remember."