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EMS Geography Yr9 Revision FLASH CARDS:
Question 2 – Earthquakes & Volcanoes
EMS Geography Yr9 Revision: Question(s)
EARTHQUAKES & VOLCANOES
What type of boundary is shown in the diagram
below? - Outline what happens here.
Answer(s)
Convergent (destructive) plate boundary where
an oceanic (e.g. Nazca) and continental (e.g.
South American) plate move towards each
other due to convection currents.
- Denser (heavier) oceanic crust is subducted
below the continental plate, forming a deep
ocean trench
- Heat from the mantle & friction between the
plates causes the oceanic plate to be destroyed
- As the plate melts, magma forms and due to
the pressure and the heat is forced to rise to the
surface
- Magma erupts at the surface as lava, forming a
composite cone volcano
- Fold mountains (e.g. Andes) are created due to
the impact of collision (earthquakes may occur)
EMS Geography Yr9 Revision: Question(s)
EARTHQUAKES & VOLCANOES
Answer(s)
- They are earthquake proof e.g. foundations
have rubber shock absorbers.
- Area is a High Income Country (HIC)
- Government invested money to protect citizens
- Building regulations in place to ensure
minimum protection
Suggest why some buildings do not collapse
after an earthquake
EMS Geography Yr9 Revision: Question(s)
EARTHQUAKES & VOLCANOES
Describe the different methods of measuring an
earthquake
EMS Geography Yr9 Revision: Question(s)
EARTHQUAKES & VOLCANOES
Answer(s)
As earthquakes reach the surface they can be
measured in two main ways:
The Richter scale measures the strength of an
earthquake.
An earthquake with large amounts of shaking
can cause lots of damage.
The scale which measures this is the Mercalli
scale.
People with a good education are often
prepared for the earthquakes
Answer(s)
- Fertile soils means it is good for farming
Give three reasons why people still
continue to live in areas at risk from
volcanic eruptions
- Family lived here all their lives
- Can’t afford to move
.
EMS Geography Yr9 Revision FLASH CARDS:
Question 2 – Earthquakes & Volcanoes
EMS Geography Yr9 Revision: Question(s)
EARTHQUAKES & VOLCANOES
Describe the effects of an earthquake on the
people and the environment.
Answer(s)
Named example: Haiti
- 230,000 people died
- 1 million people made homeless
- Toussaint L'Ouverture International Airport
and the Port-au-Prince seaport were both
heavily damaged
- All the hospitals in Port-au-Prince were
destroyed in the earthquake, and the
Medecins sans frontieres facilities severely
damaged.