Astr hw4 Essay Example | Topics and Well Written Essays - 500 words - 1

Astr hw4 - Essay Example With the activities that occur in the volcano that is the first theory, the earth experienced the cooling that made the elements cool. The elements are then exposed to the atmosphere creating a combination of droplets. With the theory water is known to be the found on the earth’s surface. The theory does not fully explain the source since seventy percent of the water sources does not originate from the earth’s surface. In the second theory, water is meant to be formed from the comets and the earth grazing. This means that the water exists in form of the water molecules on the earth’s surface. At the same time, there is a difference between water at the sea and the one on the earth’s surface (Wiegandt, 2008). 3. The snowball theory gives a brief discussion on the coldest part of the earth. The theory suggests that the earth is all surrounded by ice. There is evidence supporting the theory by the fact that Sturtian and Marinoan have isotopes of carbon that is found at the sea water. There are also a number of marine deposits at the bark of the oceans. The irons and oxides formed enable the anoxia to spread into the oceans. There are also proofs that do not support the theory because the deposits don’t have same ages not even the age sets. The Sturtian has ripples while its thickness and characters are found at the base. 4. Europa the moon has liquid that is in form of water and can primitively save living things. The liquid has got characters that will enable the human life by containing molecules that are versatile. The liquid also dissolve the nutrients that are used in the digestion and waste removal by the living creatures. Europa also has the ability to tilt the surface enabling it to have life support. 5. With the origin of life, life is reported to start from the sea because of the structures like carbonate that are found at the vents of hydrothermal. With the formation of hydrogen sulphide, hot