- The continents have grown and shrunk over time, as a result of plate tectonics. The most significant change occurred during the formation of the supercontinent Pangea, which brought all of the continents together into a single landmass. Pangea began to break up around 200 million years ago, and the continents have been moving apart ever since.

- The oceans have changed size as a result of the changing size of the continents. As the continents have grown, the oceans have shrunk, and as the continents have shrunk, the oceans have grown.

Shapes:

- The shapes of the continents have also changed over time, as a result of plate tectonics. The most significant change occurred during the formation of the supercontinent Pangea, which created a single, giant landmass. Pangea began to break up around 200 million years ago, and the continents have been moving apart ever since, taking on their present shapes.

- The shapes of the oceans have also changed as a result of the changing shape of the continents. As the continents have moved apart, the oceans have been forced to fill the gaps between them, creating the present-day ocean basins.

Positions:

- The positions of the continents and oceans have also changed over time, as a result of plate tectonics. The most significant change occurred during the formation of the supercontinent Pangea, which brought all of the continents together into a single landmass. Pangea began to break up around 200 million years ago, and the continents have been moving apart ever since, taking on their present positions.

- The positions of the oceans have also changed as a result of the changing position of the continents. As the continents have moved apart, the oceans have been forced to fill the gaps between them, creating the present-day ocean basins.