Geologic Timeline: Follow-up Questions

1. I think that in order to have had multi-cellular things on the earth, there would have had to be a single organism first. Which would mean you would have to go through a long process to produce one organism, but I think that somehow it copied itself to make others the same. I think that not all of them came out the same because some had to come out different because not everything looks the same.

2. I think the most important Eon for the earth, in terms of the development was Proterozoic eon. It was important because one of the developments was the change to an oxygen rich atmosphere. Before, the atmosphere was horrible, and could not hold life on earth. Also, life started to develop by the multi-cellular forms. Another important thing that happened was the ice age during this eon, but at the end of the ice age, the evolution of the earth accelerated.

3. Humans are not really important in the entire history of the Earth until we are created in the Phanerozoic Eon. I think that the cellular organisms, climate, and the atmosphere played a big rule in the history of the Earth. I think this because humans weren't here when the Earth was made. The Earth was made by tiny rocks floating in space that crashed together and formed as one big rock without human help.

JACLYN SALEVSKY WHITE B3
10/12/09