Flashcards
Tectonic Processes and Hazards: Key Terms
Cards in this deck (27)
- 1Plate TectonicsStates that the lithosphere is split into plates which float on the mantle
- 2CrustThe outermost layer of the Earth
- 3LithosphereThe rigid outer part of the earth, consisting of the crust and upper mantle
- 4AsthenosphereThe upper layer of the earth's mantle, below the lithosphere, in which there is relatively low resistance to plastic flow and convection is thought to occur
- 5MantleThe layer between the crust and the outer core
- 6CoreThe centre of the Earth - made up of the inner core and outer core
- 7Conservative Plate BoundaryWhere plates slide past each other
- 8Destructive Plate BoundaryWhere plates converge
- 9Constructive Plate BoundaryWhere plates diverge
- 10SubductionWhen a heavy plate is dragged down into the asthenosphere
- 11Convection CurrentsCaused by heat in the mantle - cause the plates to move
- 12PaleomagnetismPaleomagnetism is the changing of direction of the Earth's magnetic field
- 13Primary HazardsThe instant effects of a hazard
- 14TephraEjected rock fragments in a volcanic eruption
- 15Pyroclastic FlowsA fast-moving current of hot gas and volcanic matter
- 16IntensityA measure of the ground shaking in an earthquake
- 17MagnitudeThe amount of movement or displacement that releases energy
- 18EpicentreThe location on the Earth's surface that lies directly above the focus of an earthquake
- 19TsunamiA large series of waves, usually caused by an undersea earthquake, a volcanic eruption, or coastal landslide
- 20LiquefactionA phenomenon whereby a saturated or partially saturated soil substantially loses strength and stiffness in response to an applied stress, causing it to behave like a liquid
- 21Secondary HazardsOccurs due to the occurrence of another (primary) hazard
- 22HazardA perceived natural/geophysical event that has the potential to threaten both life and property
- 23RiskThe exposure of people to a hazerdous event or the probability of a hazard occuring
- 24DisasterThe realisation of a hazard - when it causes a significant impact on the functioning of a community or society
- 25VulnerabilityThe diminished capacity of an individual or group to anticipate, cope with, resist and recover from the impact of a hazard
- 26Hazard ProfileA technique used to try to understand the physical characteristics of different types of hazards
- 27Multi-hazard ZoneRegions exposed to multiple natural hazards at the same time
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- User has deleted their subject information Flashcards on Tectonic Processes and Hazards: Key Terms, created by Deleted user on 09/08/2017.
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- Created by Antonia Blankenberg · Aug 3, 2017
- Copied by Antonia Blankenberg · Aug 9, 2017
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