Model of the Atom (Niels Bohr). In 1913 one of Rutherford's students, Niels Bohr, proposed a model for the hydrogen atom that was consistent with Rutherford's model and yet also explained the spectrum of the hydrogen atom. The Bohr model was based on the following assumptions. 1.
Landforms. The Great Rift Valley is like a jagged scar on the face of Africa. It extends from South Africa, along the eastern region, and up to the Arabian Peninsula. The Great Rift Valley is a long line of escarpments that have been created by two tectonic plates drifting apart.
1. Savanna Biome The Savanna Biome is the largest Biome in southern Africa, occupying 46% of its area, and over one-third the area of South Africa. It is well developed over the lowveld and Kalahari region of South Africa and is also the dominant vegetation in neighboring Botswana, Namibia and Zimbabwe.