On a field trip, you find rock that has long, parallel grooves. form a hypothesis that explains this feature.
what other landforms would you try to find to test this hypothesis?

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.