The Earth

Structure, how it was formed, but then again this needs to be in the brain by exams

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The Earth has a layered structure, including the core,
mantle and crust. The crust and upper mantle are cracked
into large pieces called tectonic plates. These plates move
slowly, but can cause earthquakes and volcanoes where they
The Earth's atmosphere has changed over billions of years,
but for the past 200 million years it has been much as it is
The structure of the Earth
Cross section showing structure of the Earth
The Earth is almost a sphere. These are its main layers, starting
with the outermost:
1. crust - relatively thin and rocky
2. mantle - has the properties of a solid, but can flow very

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Note that the radius of the core is just over half the radius of
the Earth. The core itself consists of a solid inner core and a
liquid outer core.…read more


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