Why doesn’t the heat in Earth’s core melt Earth? (a) Heat tends not to move from place to place. (b) The core is a solid. (c) Heat escapes slowly to the surface because rock is a poor conductor. (d)...

Why doesn’t the heat in Earth’s core melt Earth?

(a) Heat tends not to move from place to place.

(b) The core is a solid.

(c) Heat escapes slowly to the surface because rock is a poor conductor.

(d) Actually, Earth’s core is not very hot.

Plate tectonics explains

(a) how seafloor spreading and subduction account for the movement of tectonic plates.

(b) why the continents move.

(c) why plate boundaries are such active geologic regions.

(d) all of these