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)
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)
