erosion
wind water ice or gravity transports soil and sediment from one place to another
weathering
rock materials are broken down by the action of physical or chemical processes
water cycle
movement of water from ocean to atmosphere to land and back to ocean
evaporation
water going into the air
condensation
gas changing to liquid
precipitation
form of water that falls to the ground
percolation
process of water or liquid passing through a filter
runoff
draining of water
tributary
stream that flows into a lake or larger river
watershed
area of land that is drained by a water system