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Earthquakes/Volcanoes (Structure of the Earth (Crust (The Earth's…
Earthquakes/Volcanoes
Structure of the Earth
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The thickest layer of the Earth is the crust. The mantle is made up of melted rock. The inner core reaches a temperature of 4000c. Closer to the centre of the Earth, the temperature becomes higher.
Tectonic Plate
Large fragments of the crust, floats on the magma in the mantle.
Tectonic Plates
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How do convention currents in the mantle move? The heated magma moves up to the Earth's crust and goes around. it then starts to cool down and moves back, this is what stretches the Earth's tectonic plates.
The Earth is made up of lots of plates so it is a bit like a jigsaw. They are in constant slow motion. The ocean floor are continuously moving.
How can we prove that the Earth has moved? The Earth's crust is split into large sections. They are called plates. They float on the mantle and move about a bit. People believe a theory that 250 million years ago all the land was joined together to form a big massive continent . It was called Pangaea. then the plates started to move and split up and this is how we know the world today.
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