THE RESTLESS EARTH UNIT 1 Q 3 0.0 / 5 ? GeographyRock landscapes and processesGCSECCEA Created by: Anniexox215Created on: 07-05-16 15:39 What are the 3 rock types? Igneous , sedimentary + metamorphic 1 of 25 How are igneous rocks formed? Magma below the earths surface in molten rock. When it hardens it forms igneous rock. 2 of 25 2 examples ? Basalt or granite 3 of 25 How are Sedimentary rocks formed? Small particles of rock or dead plants/ animals are built up as sediment below sea . they are squeezed together to form rock 4 of 25 2 examples limestone or sand stone 5 of 25 How are metamorphic rocks formed? rocks changed by heat and pressure 6 of 25 examples? limestone changes to marble 7 of 25 What 3 parts are the are the earth dived up by ? crust , mantle + core 8 of 25 what are convection currents? How the plates move . The heat moves upwards then spreads out moving the plates 9 of 25 What are the main plate movements? Constructive, destructive and collison gone , conservative gone 10 of 25 describe conservative move apart - something is built - Mid atlantic 11 of 25 descirbe destructive moving together crusts destroyed usually oceanic to continental . 12 of 25 describe collison gone two continental plates move together to form mountains 13 of 25 describe conservative gone plates slide past and stick causing earthquakes - San Francisco 14 of 25 What is the subduction zone? The area that the oceanic plate goes below the continental plate to produce a deep ocean trench and when it sticks causes and earthquake 15 of 25 How has the Giants causeway been formed? cooling of basalt an igneous rock into 40000 columns 16 of 25 How has the Antrim Plateau been formed? A large area of high flat land where lava has seeped out of a large fissure. 17 of 25 How has Slemish mountain in Co. Antrim been formed? It is a volcanic plug. The rock cooled on top of the volcano and blocked the vent . The new rock is called dolerite. 18 of 25 What is an earthquake? A tremor starting in the crust which causes shaking to be felt on the earths surface 19 of 25 what is the epicentre? the first place on the earths surface to feel shockwaves from and earthquake . Directly above focus. 20 of 25 What is the focus? the ppint of origin on an earthquake 21 of 25 What is liquefaction? The process of solid soil turning to liquid mud caused by shaking during and earthquake bringing water to the surface 22 of 25 What is a mid ocean ridge? Where 2 plates made of oceanic crust move apart the magma of the mantle rises to fill the gap causing the crust to rise and form a ridge. 23 of 25 What is the Richter scale ? A scale between 0 and 9 which measures the strength of an earth quake 24 of 25 What is a seismograph ? an instrument designed to measure the energy realesed by an earthquake 25 of 25
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