Year 7 Topic 2 How can we manage rivers and flooding? (Key Vocabulary) Flashcards
(28 cards)
Condensation
The change of state from gas to liquid.
Precipitation
Any product of water vapour that falls under gravity.
The main forms of precipitation include rain, sleet, snow and hail
Surface run off
When water reaches the ground and remains on the
surface.
Groundwater flow
Water soaks right down and fills space in the rock, then flows very slowly.
Evaporation
The change of state from liquid to gas that occurs when particles leave the surface of a liquid.
Interception
Leaves and roots intercept some precipitation as it falls
Mouth
The end of the river where it meets the sea
Source
The start of the river
Tributary
A stream or river that feeds into a larger watercourse
Confluence
The point at which two rivers meet
Channel
An area that contains flowing water confided by banks
River Bed
The ‘floor’ of a ricer channel
Watershed
The land that drains into a particular stream, lake or river
Abrasion
The material carried by the river wears away at the bed and banks
Hydraulic Action
The power of the water forces air into gaps in the banks and weakens them so they eventually collapse.
Corrosion
Some materials in rock are dissolved slowly over thousands of years by weak acids in the water
Attrition
The materials carried by the river (its ‘load’) collide with one another, making them smaller and smoother over time
Saltation
Some of a rivers load is too heavy to float and bounces along the bed
Traction
Larger stones can’t be carried at all so are rolled by the current along the river bed
Suspension
Very light parts of the load (like soil) are carried along, floating above the bed
Solution
The smallest pieces of load are so small we cannot see them. They have been dissolved into the river water
Permeable
A surface that lets water soak in
Impermeable
A surface that wont let water soak in
Infiltration
The action of water soaking into the ground
