VOLCANOES SINGULAR-VOLCANO

1
VOLCANOESSINGULAR-VOLCANO

• Learning Objective
• To find out why some volcanoes are more violent
  than others.

2
Dont forget
Volcanoes can be
ACTIVE Have erupted in recent times
DORMANT- sleeping
EXTINCT no activity left
3
Structure of a volcano
4
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!!!!!

5
Gas and steam mix to form huge clouds known as
nuee ardentes
6

• constructive(divergent)
• hot spot
• runny (basalt lava)
• cone low
• gently sloping sides
• eruptions gentle, can last for months.

7
TASK

• Pages 114 OCR GEOG
• 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.

8
(No Transcript)
9
(No Transcript)
10
(No Transcript)
11
(No Transcript)
12
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

13
So why do people live near them?
Tourism
14
GEOTHERMAL ENERGY
15
WHERE?
16
FERTILE SOILS
17
Wall built from lava
RESOURCES
CHEMICALS Sulphur to make sulphuric acid
LAVA, TEPHRA- Building materials
Church built from white lava