What is happening at point A in the diagram below? The ground warms the atmosphere through conduction.
Heat moves through the air due to convection.
The sun warms Earth's surface through radiation.
The air warms the ground through convection.

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explanation:

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the mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).

the atomic number will stay the same no matter how many electrons it has, so it doesn’t decrease nor increase. it’ll only change with a different number of protons