AS Geography unit 1 revision notes

Unit 1
-Going global (Globalisation+Global Groupings+Roots+World cities+Case studies)
-World at risk(Global hazards+Climate change+ Case studies)

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Unit 1

World at Risk

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Natural hazard- natural event or process which affects
people( causing loss of life or injury, economic damage, etc.)

Hydro Meteorological: Geophysical:
-caused by running water and its -caused by earth processes
processes(hydro) and those associated with A. internal earth processes of tectonic origin
or caused by weather patterns. ·…

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The risks are getting worse in some countries because:
1. the frequency is increasing with climate change.
2. Vulnerability is increasing as a result of unsustainable development
leading to poor land use and environmental degradation.
3. The capacity to cope is decreasing owing to poverty and
Risk are lower…

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The number of people reporting natural disasters has risen sharply
since the 1960's
There has been a
significant rise in
disasters, rises in
floods storms and
even droughts
disasters ­ we
have seen a slight
increase in
reported, this could be because more people are living…

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Reasons for this trends:
Land Pressure
Technological innovation
Economic growth
Economic development
Rapid urbanisation and growth of mega-cities
Political change
Population growth and change

However, the deaths are falling
Before a disaster ­ There is better mitigation (use of hazard proof/
climate proof structures) and improved disaster preparedness using…

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Most common hazards

Worst impacts

Why are floods and windstorms increasing?
increased warming causes warm air to rise, creating convection cells-
which form hurricanes
increasing tempereatures increase evaporation, which in turn leads to
increasing rainfall- and therefore greater flooding

Boxing day tsunami 2004
Caused by…

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Most frequent causes:
lighting strikes

How fire spreads:
Ground fires
dry leaf litter and things catch light and fire spreads through the
Crown fires
where fires spread through the tree tops
Spot fires
caused by burning embers landing away from the main fire and
starting new fires…

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