In this activity, the four pictures are all products of divergent plate boundary.
Due to the movement of plates away from each other, land formations such as rift valleys and oceanic ridges are formed like in the pictures.
2 hydrogen + 1 oxygen= water
sodium + chlorine = table salt
2 oxygen + hydrogen = milk of magnesia
calcium+ oxygen + chlorine= chlorox
examples:sound waveslinky waveswater wavesstadium wavesseismic waves
these are all mechanical since each need some medium in order to exist.