click below
click below
Normal Size Small Size show me how
Geography SA1
Term | Definition |
---|---|
Mid-ocean ridge | It is formed when two plates separate under the sea.When the magma reaches the cool seawater it cool and solidifies. |
Volcanoes | Magma reaches the surface through a vent. When magma reaches the surface it is known as lava.it flows down the side of the volcanoes.I t cools and hardens |
Earthquakes | Two plates collide causing vibrations (tremors) to rise to the surface. |
Fold Mountains | When two plates collide , the rocks buckle up into a series of folds |
Igneous Rocks | When molten magma cools and solidifies on the surface |
Plate Movement | The core heats the magma in the mantle.This makes convection current which cause the plates to move. |
Sedimentary Rocks | Remains of plants and animal life under the sea are compressed together. |
Metamorphic Rocks | Igneous or sedimentary rocks that have been heated or pressured together to make a new rock. |
Weathering | The break up of rocks without the removal of waste |
Erosion | The break up of rocks with the removal of waste |
Limestone pavement | A large area of exposed limestone |
Clints | The flat are of the limestone pavement |
Grikes | Deep gashes in the limestone pavement |
Stalactites | When water containing dissolved limestone drips from the ceiling it leaves tiny deposites of calcites. Overtime they form into stalactites |
Stalagmites | When the water with calcie drips from the ceiling it spreads out on the cavern floor. Overtime these grow up from the ground to make stalagmites. |
Pillars | When a stalagmite and stalactite meet each other and make one big pillar |
Soil creep | A form of mass movement. Downslope movement of soil under he influence of gravity |
Landslide | When a slope becomes unstable, the material fall downslope due to gravity |
Mudflow | Mudflows are moving rivers of rocks ,soil and water. |