gcse geography, definitions

define agribusiness

large scale farming

define biodiversity

different animals or plants either biotic or abiotic

define the term sustainability

using resources now without it affecting future generations

define attrition

when sediment, rocks or pebbles rub across each other or the floor bed and smooth it out or become rounded

define hydraulic action

when powerful water smashes against river banks, air becomes trapped in the cracks of the river and causes the rock to break apart

define abrasion

when pebbles grind along the ricer bank and bed in a sand-papering effect

define solution (erosion)

when the water dissolves certain types of rocks such as limestone and rock salt

define traction

large, heavy pebbles are rolled along the river bed, it is more common near the source of the river

define saltation

pebbles are bounced along the river bed most commonly near the source

define suspension

lighter sediment is carried within the water most commonly near the mouth of the river

define solution (transportation)

the transport of dissolved chemicals, this varies along the river depending on the presence of soluble rocks

define adaptation

action taken by humans to reduce their vulnerability or exposure of to impacts