River Landscapes Key Revision Points 1

Question	Answer
Drainage Basin	An area of land drained by a river and its tributaries.
Source	The start of a river.
Mouth	Where a river meets the sea.
Tributary	A stream or small river that joins a larger river.
Watershed	The boundary of a river basin. Usually highland.
Confluence	The point where two rivers meet
Types of weathering	1.Physical weathering 2.Chemicle weathering 3.Biological weathering
Hydraulic action	The pressure of the water being pushed against the banks and the bed of the river.
Corrosion/abrasion	Particles (load) carried along the river rub and wear away at the rock on the beds and banks (like sandpaper).
Corrosion	A chemical reaction between certain rock types (e.g. limestone) and the river water. The acid in the water wears the rock away.
Attrition	The rocks and pebbles hit each other and break down into smaller, smoother pieces or wear away to form sand.
Mass movement	1.Soil creep 2.Slumping

Resource summary

	Created by Tom_Herring almost 11 years ago