Wednesday, February 25, 2009
IB Topo mapping - shapes of settlements
Thursday, February 19, 2009
IGCSE Form 5 Drought research
Tuesday, February 17, 2009
Form 4 Homework
Sunday, February 8, 2009
Form 4 Spelling and definition test
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 |