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)
