volcanoes singular-volcano
DESCRIPTION
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. - PowerPoint PPT PresentationTRANSCRIPT
VOLCANOES
SINGULAR-VOLCANO
Learning ObjectiveTo 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
CHEMICALS –
Sulphur to make sulphuric acid
LAVA, TEPHRA-
Building materials
Church built from white lava
Wall built from lava