The appalachians, the oldest north american mountains, are an example of upwarped mountains.

select the best answer from the choices provided

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How has industrialization hurt the forest of europe

What weather system might be occurring if the pressure gradient decreases and fish harvests in peru are weaker than normal

1. crust 1 the metallic layer at the earth's center 2. inner core 3 the firm layer between the crust and the asthenosphere 3. lower mantle 2 the layer surrounding the inner core 4. asthenosphere 4 the semi-solid layer between the top layer and the upper mantle 5. upper mantle 5 the layer between the asthenosphere and lower mantle 6. top layer 6 the earth's outermost layer 7. outer core 7 the hottest part of the mantle