GCSE AQA Geography Section A: Natural Hazards

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Geography

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15 Terms

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What is a natural hazard?
A natural event that threatens people or has the potential to cause damage, destruction
and death.
2
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What is a natural disaster?
A natural event such as a flood, earthquake, or hurricane that has caused great damage or loss of life.
3
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The Philippines is at risk of...
Earthquakes, volcanoes, tsunamis, tropical storms, floods and landslides
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What are examples of natural hazards?
tropical storms, tsunamis, landslides, earthquakes, floods, volcanoes etc
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What are geological hazards?
Caused by land and tectonic processes. E.g. volcanoes, earthquakes, landslides and avalanches
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What are meteorological hazards?
Caused by weather and climate. E.g. heatwaves, climate change and tropical storms
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What is hazard risk?
The probability that a natural hazard occurs
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Factors that influence hazard risk are..
ability to cope, vulnerability, nature of natural hazards,
frequency, magnitude, urbanisation and climate change: warmer world=more energy=more natural hazards
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What factors are there which impact a countries ability to cope with a natural hazard?
Preparation- HIC governments build flood defences + evacuate the population / LIC's don't resources or ability

Income- LIC's will have lower incomes, weaker houses, more damage / HIC's will have stronger houses -> less damage
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what are factors that predict how bad a natural hazard is?
Predictability- some hazards are more predictable (e.g. earthquakes are less predictable than tropical storms; governments cannot prepare and evacuate)

Frequency- how often it happens

Magnitude- the size of the hazard can possibly do more damage and injury
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What are the primary effects of natural disasters (immediate impacts)?
- buildings and roads are damaged
- people are injured, killed
- crops and water supplies damaged/contaminated
- electricity cables,gas pipes and communication networks damaged -> cutting off supplies
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What are secondary effects of natural disasters? (aftermath impacts)
- aid and emergency vehicles cannot get through because of blocked roads/bridges- which can cause more deaths

- clean water shortage + lack of proper sanitation spreads disease

- food shortages if crops are damaged, livestock are killed are supply lines are blocked

- country's economy weakened- damage to business causes unemployment -> reconstruction process is expensive
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What are the immediate responses to natural disasters?
- evacuation
- first aid
- recovering dead bodies to prevent the spread of disease
- providing temporary supplies of electricity/gas if regular supplies are damaged
- providing food,water and shelter to the homeless
- foreign governments or charities sending aid workers, supplies or financial donations
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What are the long-term responses for natural disasters?
- repairing homes or rehousing people
- repairing damaged things
- reconnect broken electricity, water, gas and communication connections
- improve forecasting, monitoring and evacuation plans
- improve building regulations so buildings can withstand similar hazards
- boost economy recovery (e.g. tourism)
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What is the disaster risk equation?
Risk = Hazard X Vunerability / Capacity to cope