Natural Hazards 0.0 / 5 ? GeographyNatural hazardsGCSEAQA Created by: moonbow0701Created on: 10-11-18 19:33 What is a Natural Hazard? A natural event that threatens people or has the potential to cause damage, destruction & death 1 of 32 Atmospheric Hazard Created in the atmosphere by the movement of air and water 2 of 32 Tectonic Hazard Created by the movement of tectonic plates or surface rock and soils 3 of 32 Hydrological Harzard Created by rivers,seas or oceans 4 of 32 Biological Hazard Any biological substance that poses a threat to the health of people 5 of 32 Tectonic Plates Rigid segments of the earths crust which can float across the heavier, semi-molten rock below 6 of 32 Plate Margin The edges of plates where 2 plates are either moving apart, colliding or sliding past each other 7 of 32 The oceanic crust denser, newer and thinner 8 of 32 The continental crust less dense, older and thicker 9 of 32 Crust the crust is fractured into tectonic plates 10 of 32 The mantle a zone of molten silicates and other materials 11 of 32 Convection Currents heat currents in the molten magma that move the crust very slowly 12 of 32 Outer core under slightly less pressure 13 of 32 Solid core made of iron and nickel, 14 of 32 Earthquake a sudden or violent movement within the earths crust followed by series of shocks 15 of 32 Primary Waves Travel Fast, causing back and forth movements 16 of 32 Secondary Waves Travel slow, causing side to side movements 17 of 32 Social impact the effect on the lives of people or community 18 of 32 Economic impact the effect on the wealth of an area or community 19 of 32 Environmental Impact the effect on the landscape and ecology on the surrounding area 20 of 32 Adaptation Is an action taken to natural event such as volcanic eruption, to reduce potential damage 21 of 32 Mitigation To reduce the long term hazard and eliminating the impact of human life 22 of 32 What is the GACM Global Atmospheric Circulation Model 23 of 32 High Pressure Cold air sinks 24 of 32 Low Pressure Warm air rises, cools, condenses and forms clouds 25 of 32 Weather the day to day changes in atmosphere conditions such as temperature and precipitation 26 of 32 Climate The average atmospheric conditions for an area calculated across 30 years 27 of 32 Continental Air Cold Winters coming from the east 28 of 32 Tropical Maritime Storms from the Atlantic bringing heavy rain and strong winds 29 of 32 Tropical Continental Hot and sunny causing heatwaves and droughts 30 of 32 Polar Air Very cold bringing heavy rain and strong winds 31 of 32 Climate Change A long term change in the earths climate especially a change due to an increase in the average atmospheric temperature 32 of 32
Comments
No comments have yet been made