Plate tectonics implies that Earth must be expanding.

Question

Quizplus · Accepted Answer

Plate tectonics describes the movement of Earth's crustal plates, but it does not necessarily imply that Earth's overall size is changing. In fact, while new crust is created at mid-oceanic ridges, it is also destroyed at subduction zones, which could potentially balance out any expansion. Additionally, measurements of Earth's size have remained relatively constant over time, with only very slight variations due to factors such as the gradual cooling and contracting of the planet's interior.

Plate Tectonics Implies That Earth Must Be Expanding