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Earth

A
Alib57420

1 Views • Feb 12, 2016

Description

The planet on which we live — the third planet from the sun. Note: The Earth was formed at the same time as the sun, about 4.6 billion years ago. Note: It consists of an inner core made of iron and nickel, an outer core of liquid metal, a mantle, and, on the outside, a crust.

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