Geography Key Terms 0.0 / 5 ? GeographyNatural hazardsPlate tectonicsEcosystems and biodiversity under threatRural and urban challenges and regenerationA2/A-levelAQA Created by: PrayingForA'sCreated on: 13-02-16 15:31 Constructive boundary Where 2 tectonic plates move apart 1 of 10 Focus The point below where the earthquake begins 2 of 10 Destructive boudary Where the oceanic crust subducts below the continental 3 of 10 Richter scale Measures the magnitude of eathquakes 4 of 10 Social impacts Impacts of a natural hazard which affects people 5 of 10 Composite volcano A volcano with steep slopes and constructed layers of ash and lava 6 of 10 Shield volcano A volcano with gently slopes and occurs at constructive plate boundaries 7 of 10 Lahar A mudflow created by water and pyroclastic flow 8 of 10 Pyroclastic flow A fast moving current of hot gas and rock 9 of 10 Viscous lava Thick lava which has cooled quickly and flows slowly 10 of 10
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