What is suggested to have contributed to the permian period mass extinction? volcanic activity climate change meteorites all of the above

your answer is "the 1950's"

one part of the electromagnetic spectrum that arrives on earth as solar radiation from the sun is the visible spectrum. wavelengths of the visible spectrum combine to form what we refer to as

answer - d) ultraviolet radiation.

violet /   380–450 nm / 668–789 thz

violet is number 1 in the chart of visible light.