Final answer:
The formation of the supercontinent Pangaea increased geological activity, including mountain building and volcanic eruptions, but did not cause the Earth to become molten or freeze over entirely.
Step-by-step explanation:
When all of the continents formed a supercontinent, geological activity increased. This supercontinent is known as Pangaea. During this period, the Earth did not become molten, nor did it freeze over completely. However, Earth's climate cooled, leading to ice ages and a drop in sea levels due to the water getting frozen in glaciers. While the interior forces of the Earth reshaped the surfaces through buckling, twisting, and forming mountain ranges, the external impacts also caused eruptions and contributed to the extensive volcanic activity.