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Presentation transcript:

Starter – folder Powerpoint Do starters 1 & 3 with class

Key Questions How is the earth structured? What are the differences between the earths crust?

I am going to drill down through the earth to a depth of 6000 km. On my journey to the centre: What do you think I would find? Does it have a proper name? Do you think it is the same all the way down or does it change? What is it made of? Is it hot or cold? What is its texture?

The Structure of the Earth

Outer core Crust Mantle Inner core Attach labels to the correct part of the diagram.

The Earths Crust Continental Crust is the material which makes up all the world’s land masses. It is old, light and permanent. It varies in depths up to 70km thick under mountains. Oceanic Crust is the heavy material found under the earths oceans and seas. It is younger as the material is constantly being destroyed and recreated.It varies in depths of 5 to 9km.

Thin layer Thickness: 6 to 70km Made of 2 types of solid rock Thickness: 2,900km. Temperature between 1300 o C & 5000 o C. molten rock is very gooey like treacle (The proper term is Viscous) Depth of 6,500 km Made up of iron and nickel. Solid due to the pressure Temperatures up to 5500 o C. Thickness 2700km wide Molten iron and nickel Liquid Depth of 5000km Thickness: 2000km Temperatures 2,700 o C. This layer gives the earth its magnetic field. The layers: CRUST MANTLE OUTER CORE INNER CORE Extension: Label Continental and Oceanic crust – write out the correct information for each This is the land under the sea It is younger and heavier constantly destroyed and replaced. This is the land itself. It is older and lighter and permanent.

By the end of this lesson, you will be able to answer the following questions Key Questions What are tectonic plates? What tectonic plates make up the earths crust?

Location, Location, Location Where do volcanoes and earthquakes occur? Why do volcanoes and earthquakes occur in these places?

Convention Currents Mantle Crust

True or False Volcanoes and earthquakes occur along the west coast of North and South America Volcanoes and earthquakes are not found in Europe Some places have earthquakes and not volcanoes Austrailia does have volcanoes and earthquakes There is an Indian Ring of Fire The mantle is solid Conduction currents move the plates Volcanoes and earthquakes occur on plate boundaries