Answer:
Greenhouse gases, including water vapor, carbon dioxide, and methane, form a small percentage of the overall atmosphere, yet they play an important role, trapping the heat required for life on Earth.
Formation of igneous rock is not a function of soil.
The border between the outer core and the inner core is about 5,100 km<span> below the surface of the Earth. (The crust is usually between 3 and 70 km thick, being thicker in the continents and thinner in the oceans,)
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