Geography C1 Restless Earth
- Created by: Will Pound
- Created on: 24-02-14 19:44
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- Geography C1 Restless Earth
- There are three divisions of the Earth
- Core
- Intensely hot
- Largest of the 3
- Mantle
- Inbetween Core & Crust
- Crust
- Very Thin
- Core
- Types of crust
- Continental crust
- Makes up most of the land area of the Earth. It is dominated by rocks such as granite
- Oceanic crust
- Much thinner
- Made up of rocks such as basalt
- Continental crust
- How Earth's tectonic plates move
- High temperatures in the core create rising limbs of material in the mantle called convection currents
- Different types of plate boundary
- Constructive
- Formed by rising magma splitting up continental crust and forming new oceans
- The Eurasian Plate is separating slowly from the North American plate
- Destructive
- Oceanic plates collide with continental plates
- As an oceanic plate is subducted into the mantle it is subjected to increase pressure and temperature
- This is known as subduction
- Conservative
- Where plates slide past each other
- Constructive
- Different hazards and their causes
- The impact of any hazard depends on:
- The size of the event
- The vulnerability of the population
- Poverty increase vulnerability
- How prepared people are for it
- The impact of any hazard depends on:
- The impact of earthquakes
- The magnitude on the Richter scale
- The depth (Shallow earthquakes are more destructive)
- The distance from the epicentre
- Time of the day
- How prepared the place is
- The quality of emergency services
- Primary impacts
- The immediate effect of an earthquake on property and people
- Secondary impacts
- The impact on property and people of an event after it has finished. For example: Lack of shelter and basic supplies
- Living with Volcanoes
- Active, Dormant or Extinct
- Primary & Secondary impacts
- Social & Economic
- Prediction, warning & evacuation
- Gas emissions and 'bulging' of a volcano
- Tsunami warning sirens
- Emergency plans in place
- In the developed world more money is available to make new buildings safer
- Haiti & New Zealand
- There are three divisions of the Earth
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