Transcript Pages 114 OCR GEOG Make a copy of table 3.2 . Locate them on

VOLCANOES
SINGULAR-VOLCANO
Learning Objective
To find out why some volcanoes
are more violent than others.
Don’t forget……
Volcanoes can be
ACTIVE – Have erupted in recent times
DORMANT- ‘sleeping’
EXTINCT – no activity left
Structure of a volcano
Types of Volcanoes
a.k.a strato
• destructive(convergent)
• formed at subduction
zone
• melted crust,water,C02
• magma sticky (viscous)
• steeper cone
• layers ash/lava
• explosive!!!!!
Gas and steam mix to
form huge clouds
known as nuee
ardentes
• constructive(divergent)
• hot spot
• runny (basalt lava)
• cone low
• gently sloping sides
• eruptions gentle, can last
for months.
TASK
Pages 114 OCR GEOG
1.Make a copy of table 3.2 . Locate them on
your map of plate boundaries. Add a column
to the table to show the type of plate
boundary that each volcano is associated
with.
TASK
• Use page 114 OCR and internet research.
• Produce a table to show the main dangers of
volcanoes.
• Define each hazard and say whether it is
dangerous. Give evidence to support your
answers.
• Pyroclastic flows, nuee ardentes, lahars,
landslides, poisonous gases, lava flows, tephra
So why do people live near them?
Tourism
GEOTHERMAL ENERGY
WHERE?
FERTILE
SOILS
RESOURCES
Wall built from lava
CHEMICALS –
Sulphur to make sulphuric acid
LAVA, TEPHRABuilding materials
Church built from
white lava