Answer:
The exosphere is the fifth and outermost layer of Earth's atmosphere.
It is situated above the thermosphere at an altitude of 500 - 1 000 km (311 - 620 miles) and extends to 10 000 km (6 200 miles).
It has no clearly defined lower and upper boundary.
The Earth's interior consists of rock and metal. It is made up of four main layers: 1) the inner core: a solid metal core made up of nickel and iron (2440 km diameter) 2) the outer core: a liquid molten core of nickel and iron. 3) the mantle: dense and mostly solid silicate rock. 4) the crust: thin silicate rock material.
Explanation:
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