Astronomy fifth assignment Essay Example | Topics and Well Written Essays - 500 words - 1

Astronomy fifth assignment - Essay Example This view is quite controversial and is known as "Snowball Earth." Summarize what this theory is and what is some of the evidence for and against this hypothesis. Snowball Earth describes hypothesis that many years the Earth was wholly or entirely covered with ice that stretched from the poles to tropics. The freezing happened in the pre-cambrian, over 60 years ago. It is thought that there occurred more of global glaciations. They differed in time and stretch but when a full on snow events, life could be attached on ice free refuges or at places where sunlight managed penetration through the ice allowing photosynthesis. The opponents of the theory contest the effect of the evidence for the glaciation, the geophysical feasibility of the ice and the difficulty in escaping the frozen condition. 5. Do some research on the warming in the arctic and the thawing of Arctic permafrost which releases Methane as part of the thawing process. Discuss whether or not you think we are now heading towards a climate