Form 4 Spelling and definition test

Hi everyone

Here are the terms that you need to learn for a test this week:

Impermeable	A rock that will not allow water to pass through it
Porous	A rock containing tiny pores that allow water to be stored
Saturation	When all the pores have been filled with water in the ground
Limestone	A type of sedimentary rock
Interception	When vegetation prevents precipitation from reaching ground level
Meander	A river bend
Hydraulic action	Erosion caused by the force of water breaking off pieces of rock
Suspension	A process of transportation in which material is picked up and carried along in the water itself
Igneous	A rock formed by magma cooling within the earth’s crust or by lava cooling on the surface
Infiltration	The point at which water passes into the ground
Sedimentary	A rock that has been laid down in layers
Attrition	Erosion caused when rocks and material bump together in a river and break up into smaller pieces
Wetted perimeter	Where water comes into contact with the river banks and bed
Metamorphic	A rock that has been altered by extremes of heat and pressure
Permeable	A rock that will alow water to pass through it
Discharge	The velocity of the water x its volume at a given point in the river
Delta	An area of silt deposited by a river when it enters a lake or sea
Velocity	The speed of the river
Ox-bow lake	A crescent-shaped lake formed after a river cuts through the neck of a meander
Corrasion	Erosion caused by the rubbing of material carried by rivers
Evapotranspiration	The loss of moisture from vegetation
Saltation	A method of transportation where small particles are ‘bounced’ along the river bed
Interlocking spur	A series of spurs that project alternately from the sides of a V-shaped valley
Corrosion	Erosion caused by acids in rivers dissolving rocks
Weathering	The breaking down of rocks in situ
Deposition	The laying down of material previously transported by a river