River Action

Question 1

Drainage Basin

Answer 1

The entire area drained by river and tributaries

Question 2

Watershed

Answer 2

Boundary between each drainage basin

Question 3

Relief

Answer 3

How steep or gentle land iz

Question 4

Confluence

Answer 4

Point at which rivers join

Question 5

Dentritic patterns

Answer 5

Upland, undlying material eroded in all directions, main rivers have deepest valley

Question 6

Trellis patterns

Answer 6

Right angled confluences, found where folding has occured it hardness of rock varies

Question 7

Radial Patterns

Answer 7

Running off conical hill or mountain

Question 8

Parallel pattern

Answer 8

Parallel due to shape of structure of land, run along valleys created by fold Mt.s

Question 9

Deranged pattern

Answer 9

No particular pattern, common in lowlands subject to glacial deposition

Question 10

Erosion:
Hydraulic Action

Answer 10

Force of river against banks, air gets trapped in cracks, pressure weakens banks and wears away

Question 11

Erosion:
Abrasion

Answer 11

Rocks being carried smash together and break into smaller, smoother and rounder pieces

Question 12

Erosion:
Solution

Answer 12

Soluble particles dissolved by river

Question 13

Transport: Traction

Answer 13

Heavy rocks and boulders rolled along bed, happens often in floods, current is strong

Question 14

Transport: Saltation

Answer 14

Small stones bounced along bed, slower flow than traction

Question 15

Transport: Suspension

Answer 15

Tiny particles of clay suspended in water. Particles settle if kept in a jar and water will look clear overnight

Question 16

Transport: Solution

Answer 16

Material dissolved, invisible, no colour added to water, often karst landscapes, water is very acidic