In the cycle where would mantle rock be the most densest?

What first caused people to consider that the continents were once one large landmass?

Determine which of the two measurements in each set is lesser.10°f or 20°ca. 10-fb. 20°c

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