topic 1 Flashcards
what describes the outer core
a liquid layer 2200 km in thickness
which layer of the earth has the highest density
inner core
what causes a tsunami
earthquakes, the snappping movement in the plates causes a major vibration that discplaces the water.
underwater volcanic eruptions
one primary impact of tectonic hazards
destruction of buildings
one natural cause of climate change
asteroid collisions can cause cooling as large quantities of ash and dust are in the atmosphere.
volcanic eruptions can cause warming through prduction of co2
one source of data used to calculate the saffir simpson scale of a tropical cyclone
recorded windspeed
why is haiti vulnerable to hurrican mathew
haiti has low gdp, meaning the country cannot build housing that can withstand extreme weather events.
haiti has a low hdi meaning the population are less likely to be educated on how to prepare with an earthquake.
2 ways gis maps are able to prepare countries for tropical cyclones
shows the intensity of the wind speeds so the correct methods can be used to evacuate people.
countries may be able to track and predict the path of the tropical storm and can evacuate these areas.
explain one way global atmospheric circulation determines the location of low pressure areas.
the itcz is an area of low pressure with high rainfall, this is where the warm air rises, cools and forms a cloud. high pressure at 30 degrees n/s where deserts are found.
how did japan prepare building codes
japan have strict building codes. they are built to withstand seismic activity and infastrucutre is designed to resist earthquakes and tsunamis. they have shock absorbers to relieve stress on the builidng, strong steel frames that can move slightly. cross bracing which stops floors collapsing. double glazing. very deep foundations to keep houses on the ground/
summary of sendai earthquake
march 11th 2011
convergent plate boundary
magnitude 9.0
largest recorded earhtquake in japan.
28,000 confirmed dead or missing.
prepare early warning systems
japan have an advanced alert system. this provided alerts to people and infastructure before the earthquake struck. this giving people time to prepare for the earthquakes
emergency drills
schools regularly hold earthquake drills, duck and cover drils. this educates people in what to do in the event of an earthquake.
disaster response plans
japan has detailed response plans on what to do in the event of an earthquake. these plans include search and resuce operations, evacuation procedures, providing emergency supplies and medical care. high tsunami walls to prevent flooding in the mainland,
the japanes meterological agency
constantly monitors seismic activity, notifies people before the earthquake begins. gave a tsunami warning before the tsunami hit so people on the coast could evacuate.
