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Biology, 24.09.2019 20:40 ayeheavymetal
Ultraviolet radiation is dangerous because it has a high enough energy to damage skin cells. uv radiation is called ultraviolet because it has a frequency which is higher than violet radiation (purple light). therefore, it has a wavelength which is than violet radiation.
a) bigger
b) smaller
c) the same size
d) the square root of
8)
erosion of the beach is normally a slow process. what is one factor involved in this erosion?
a) animal motion
b) changing tides
c) emptying rivers
d) building coral reefs
9)
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