GEOGRAPHY

• label the internal structure of the earth

  crust, mantle, outer core and inner core
• the crust is made up of solid rock
• the mantle is mostly made up of molten rock (magma)
• the mantle is made up of molten rock
• the inner core is solid iron and nickel
• what are is a plate

  Earths hard outer part is broken into big slabs called plates which move around
• what is a plate margin

  where two plates meet
• why do the earths plates move

  due to convection current in the mantle.Heat from the core heats the magma in the mantle.This causes the hot magma to move up towards the crust.When it gets close to the crust it begins to cool and sink
• what happens at a constructive plate boundary

  convection currents in the mantle force the plates to move away from each other. This creates a gap and magma wells up
• what happens at a destructive plate margin

  convection currents in the mantle force the plates to move away from each other. The oceanic crust which is denser gets forced into the mantle where it is destroyed
• what happens at a collision plate boundary

  when convection currents in the mantle cause two plates of the same type to move together. This causes the material between them to buckle and rise up forming fold mountains
• what happens at a conservative margin

  convection currents in the mantle force the plates to move past each other
• what is an earthquake

  shaking of earths crust, caused by sudden rock movement
• where is the epicentre of an earthquake

  the point on the earths surface directly above the focus
• what is the focus

  the point at which the rock moves
• where do seismic waves begin

  they start at focus
• how can you measure a earthquake

  using a Richter scale
• what is a volcano

  where lava erupts at earths surface
• what is a tsunami

  waves generated by an earthquake in the ocean floor
• how do Igneous rocks form

  when molten magma or lava cools and hardens
• What is a Sedimentary rock

  formed from sediment sandstone is formed from a sediment of sand
• what is the primary industry

  collects raw materials from the earths surface eg farming
• what is the secondary industry

  processes the raw materials in factories to produce products eg cotten
• what is the tertiary industry

  uses the products to provide services eg shop
• what is the quaternary industry

  people use their high-level expertise to help other sectors eg they develop new types of treatment, new technology
• what are MEDC’s countries

  wealthy as they earn large GDP’s. Have a high level of health care and good quality of education
• what are LEDC’s countries

  poor since they earn low GDP’s. Low level of education and health care