Geography 2
ODD ONE OUT
Class discussion
Volcanic activity has an important part to play in the rock cycle, forming new mountains, islands and rocks to keep this continuous cycle going.
Take a look at these three enormous volcanoes photographed from space:
Mount Teide, Mount Cleveland, and Olympus Mons.
Which is the odd one out?
What are their similarities?
What are their differences?
volcanoes lesson 3.mp4
In pairs, orally retell how a volcano erupts.
Volcanic eruptions
Most volcanic eruptions are caused by tectonic plates moving towards each other, which usually produces violent eruptions.
Other volcanoes, such as Mauna Loa in Hawaii are caused by hot spots in the Earth’s crust. These do not erupt violently and lava usually flows slowly out of them.
Eruptions from volcanoes can be very dangerous. They can produce:
- pyroclastic flows - fast moving clouds of hot ash, gas and rock
- ash clouds - small pieces of rock and glass that can be carried in the air for many kilometres
- volcanic bombs - large bits of very hot rock blown out of a volcano
Volcanoes can, however, help people living near them earn money by bringing in tourists to the area and improving the soil so that crops can be grown.
mount-vesuvius.mp4
Benefits of living by a volcano
People choose to live in volcanic areas despite the risks of an eruption. Volcanoes can provide people with many benefits such as:
- volcanic rock and ash provide fertile land which results in a higher crop yield for farmers
- tourists are attracted to the volcano, which increases money to the local economy
- geothermal energy can be harnessed, which provides cheaper electricity for locals
- minerals are contained in lava, eg diamonds - these can be mined to make money
Your Task
L.C: To explain why people would settle near volcanoes
Explain why people would settle near volcanoes.
Use language of explanation.
Because...
However
Therefore...
Meanwhile
In addition …