LSTD 3433: Unit 2 The Dynamic Earth (Internet Research)

Internet Source 1 : Origin of the Earth

In a brief discussion , the earth 's origin was described using the 12-month calendar . There wasn 't happening much during the first half of the year . One midnight , the universe was formed but the galaxy (Milky Way ) doesn 't form until May 1 and there 's no solar system , until September 9 . The earth was formed on September 14 and life began by the end of the month . Eukaryotes (first cells with nuclei ) multiplied by mid-November and there is an increase of oxygen in the atmosphere

by December . Worms appear first , and then plants dominate most lands , then dinosaurs as the first animals

Internet Source 2 : Origin of the Moon

The site states that before the Apollo voyage to the moon , there are three traditional theories that materialized . First , the moon formed as part of the earth and it broke off . The second theory states that if it is not a part of the earth , it formed in orbit around the earth . The third theory states that of did not formed ion orbit , it must have found somewhere else and been captured . However , the similarity of earth 's rocks to the moon explains that it has been part of the earth before

Internet Source 3 : Structure of the Earth

The article tells that there are four main layers . The earth is composed of the inner core , outer core , mantle , and crust . The site has provided ample amount of information about the different layers...