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