The bowl-shaped depression at the top of a volcano is a
a. crater.
b. fissure.
c. vent.
d. conduit.

The country in the world with the largest population is_?

What does 2[tex] {2}^{ - 4} \times {2}^{ - 2} [/tex]

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