Glacier begin to from when more snow falls during the winter than melts and evaporates in summer. The excess snow gradually builds up in layer. its increasing weight causes the snow crystals under the surface to...

A desert landscape includes various kinds of surface features created by water and air erosion and by deposits of silt, sand, and other sediments. The drainage system is made up of normally dry streams called arroyos. After a rainfall, water fills the stream channels called wadi  1....

Erosion is the natural process by which rock are broken loose from the Earth,s surface at one location and moved to another. Erosion changes land by wearing down mountains, filling in valleys, and making rivers...