Processes of erosion

When pebbles grind along the river bank and bed in a sand-papering effect

Processes of erosion

When rocks that the river is carrying knock against each other. They break apart to become smaller and more rounded.

Processes of erosion

When the water dissolves certain types of rocks, e.g. limestone.

Weathering processes

Rainwater is slightly acidic and over time this dissolves rocks such as limestone and chalk.

Weathering processes

This occurs when plants and animals break up rocks, for example, roots growing in cracks in the rock or animals such as rabbits burrowing into rock.

Weathering processes

Mechanical (freeze-thaw) weathering requires which of the following?

The movement of rocks and soil downslope due to gravity.

Transportation processes

Large, heavy pebbles are rolled along the river bed. This is most common near the source of a river.

Transportation processes

Pebbles are bounced along the river bed, most commonly near the source.

Transportation processes

Lighter sediment is carried within the water, most commonly in the middle and lower course of the river.

When the river loses energy, it drops any of the material it has been carrying. This is known as...

Features of the drainage basin

A small river or stream that joins a larger river.

Features of the drainage basin

The point at which two rivers meet.

Features of the drainage basin

The area of high land forming the edge of a river basin.

Features of the drainage basin

This is where the river flows.

The area of land drained by a river and its tributaries.

Mass movement

When material moves downslope in a rotational manner along a curved surface.

Mass movement

Where material moves rapidly downslope in one go