Geography Extreme Earth Year One

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Presentation transcript:

Geography Extreme Earth Year One Geography | Year Three | Extreme Earth | Volcanoes | Lesson 2

Volcanoes

Aim Describe and understand key aspects of physical geography in the context of volcanoes. Success Criteria I can show you how tectonic plates move. I can tell you how a volcano is formed. I can name some of the parts of a volcano. I can tell you what happens when a volcano erupts.

Can you remember what’s under your feet? crust mantle outer core inner core

Eyjafjallajokull . Eyjafjallajokull is a volcano in Iceland. Watch this video of it erupting in 2010.

Tectonic Plates The Earth’s crust isn’t one solid layer. It is broken up into huge areas called tectonic plates that float on top of the mantle. This map shows where the tectonic plates are.

How can you move your plates? Use the two pieces of paper you have been given. Lay your “plates” flat onto the table. How many different ways can you move the plates around? Rubbing together Towards each other Away from each other

What have tectonic plates got to do with volcanoes? Watch the video of a helicopter flight along the rift between two tectonic plates This valley is over 9000 years old. It is getting 7 mm wider every year as the plates are still moving apart. The rocky valley floor was created by cooled lava. This valley is surrounded by volcanoes that have formed as the plates move apart Photo courtesy of Rob Young (@flickr.com) - granted under creative commons licence – attribution

How are volcanoes made? Magma rises through cracks or weaknesses in the Earth's crust. Over time, after several eruptions, the rock builds up and a volcano forms. The lava from the eruption cools to form new crust. Pressure builds up inside the Earth. When this pressure is released through plates moving, magma explodes to the surface causing a volcanic eruption.

What’s it all called? eruption cloud crater lava main vent magma chamber

How a Volcano is Made Use the Activity Sheet you have been given to explain how a volcano is created and grows, and what its main parts are called.

Watch what happens when the vinegar is added to the liquid in the cup! Go with the flow! Watch what happens when the vinegar is added to the liquid in the cup! Photo courtesy of bradleypjohnson (@flickr.com) - granted under creative commons licence – attribution

Aim Describe and understand key aspects of physical geography in the context of volcanoes. Success Criteria I can show you how tectonic plates move. I can tell you how a volcano is formed. I can name some of the parts of a volcano. I can tell you what happens when a volcano erupts.