The permanency of position has been challenged by major theories such as continental drift theory, sea floor spreading theory and other theories of landform development. These theories help us understand the dynamic nature of Earth's surface and explain various geological phenomena observed across the globe. INITIAL OBSERVATIONS Distribution of Landmass and Water Bodies There is more concentration of landmass in the northern hemisphere (approximately 75% of landmass ) while there is more concentration of water in the southern hemisphere. Shape of Continents Except for Australia and Antarctica , most of the continents are roughly triangular in shape . Similarly, the majority of oceans are also triangular in shape . Antipodal Arrangement The triangles are arranged in such a manner that for the continents the base is to the north and apex is to the south , while for the oceans the base is to the south and apex is to the n...