The glaciers and ice sheets of the world are changing as a result of human-induced climate warming. Many physical factors contribute to the flow of ice and mass change of glaciers and ice sheets. We begin by introducing these processes and their interactions through topics including glacial hydrology, controls on glacial sliding and different types of glacial systems such as ice sheets and valley glaciers. In addition to important links between glaciers and climate, ice has a dramatic impact on landscapes of the world. We will look at glacial geomorphology and examine how ice has carved and shaped our environment.