Which statement or question could be used as a hypothesis? A. The density of water will change as it freezes.
B. Why does ice float on top of a lake?
C. How much sugar can be dissolved in 10 liters of water?
D. Earth is the best planet to live on because it has a large amount of
water

A.

The density of water will change as it freezes

Explanation:

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the ozone layer acts as a filter for the shorter wavelength and highly hazardous ultraviolet radiation (uvr) from the sun, protecting life on earth from its potentially harmful effects. when the sky is clear, there is an inverse relationship between stratospheric ozone and solar uvr measured at the earth's surface.

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).