The really big ball that we live on is made of huge pieces of ground that move around. Sometimes they knock into each other, run away from each other, or slip side to side. If two of them get stuck, power builds up in the rock and lets go as they are set free. The ground shakes a lot, large cracks form, rocks might slip down, and houses fall. If that happens in the big water area, a very tall wave will move onto the land and run into it. [M. T.]
#Earthquake #UpGoer5 #McGillUniversity