Plate Tectonics Answers

Scientists discovered that new molten materials from inside Earth create new .

Through the process of [___], old, dense crust is pushed toward a deep-ocean [___]. There, it sinks under lighter crust. It returns to molten rock, becoming part of the [___] again.

Through the process of [___], old, dense crust is pushed toward a deep-ocean [___]. There, it sinks under lighter crust. It returns to molten rock, becoming part of the [___] again.