MASTER OF ARTS (GEOGRAPHY) Study Guide - Reducing Atmosphere, Hydrosphere, Outer Core
4 Apr 2023
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Other planets and moons in our solar system have atmospheres, but none of them could support life as we know it. They are either too dense (as on venus) or not dense enough (as on mars), and none of them have much oxygen, the precious gas that we earth animals need every minute. Some scientists describe three stages in the evolution of earth"s atmosphere as it is today. Origin of atmosphere: earth is believed to have formed about 5 billion years ago. This started the evolution of the present atmosphere. Evidence of such an anaerobic reducing atmosphere is hidden in early rock formations that contain many elements, such as iron and uranium, in their reduced states. Elements in this state are not found in the rocks of mid- This solar energy conversion process is known as photosynthesis. Some of the photosynthetically created oxygen combined with organic carbon to recreate.
