Biology, 28.01.2020 15:55 jazzytazzyyy

How does the quantity of zinc used in a mineral-based sunscreen affect an individual's chance of getting a sunburn?

which statement forms the best testable hypothesis for the question?

1) if spray-based sunscreens require less time to apply and dry because they include less zinc, then individuals who use spray-based sunscreens will have a reduced chance of getting a sunburn.
2)if the quantity of zinc in a mineral-based sunscreen affects the total amount of uva and uvb rays absorbed, then increasing the amount of zinc will decrease an individual's chance of getting a sunburn.
3)if mineral-based sunscreens are thick and opaque when applied due to more zinc, then they will decrease an individual's chance of getting a sunburn.
4)if mineral-based sunscreens contain more zinc in them, then individuals who use them will decrease their chances of getting a sunburn.

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How does the quantity of zinc used in a mineral-based sunscreen affect an individual's chance of get...

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