What element blocks excessive ultraviolet radiation from reaching the earth?
A)hydrogen
B)nitrogen
C)helium
D)oxygen

Question

Quizplus · Accepted Answer

Oxygen in the Earth's atmosphere absorbs most of the harmful ultraviolet radiation from the sun before it reaches the surface of the Earth. Nitrogen also absorbs some ultraviolet radiation, but it is not as effective as oxygen. Hydrogen and helium are not found in large quantities in the Earth's atmosphere and do not block ultraviolet radiation in the same way as oxygen and nitrogen.

What Element Blocks Excessive Ultraviolet Radiation from Reaching the Earth