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Earth History

            
             What has happened through earth geologic history? Scientists have figured out a way to make a time scale by using rock sediment. By looking at a stacked arrangement of rocks scientists can determine the age of fossils and rocks called a geologic column. Through this geologic column scientist have been able to break the earth's history down into different periods of time.
             The sediment found in rock layers can determine what the Earth's surface and climate was like at a given time in history. Scientists have given names to these certain points of time or eras in history. The oldest Era is the Precambrian Eras dating back further then 4 billion years ago. The Next era is the Paleozoic Era starting 570 million years ago. The Mesozoic Era then began after 325 million years of the Paleozoic Era. Then 65 million years ago the Cenozoic Era began dating up to recent history.
             The Precambrian Era or the time dating back to the formation of the Earth 4.6 billion years ago is most of the Earth History. During this time the Earth was mainly covered by water. Volcanic Eruptions, and Mountain building to place developing the Earth's surface. During this time there was minimal life except for life forms such as marine worms, jellyfish and bacteria. .
             The Paleozoic era is broken up into many periods because the amount of life during this time. Also during this time the continent of Pangaea was formed because of tectonic collisions. Fish began to swim the oceans and plants began to grow on land. The most dominant life form during this time was mollusks or sea creatures with hard shells. At the end of this Era insects and invertebrates began to strive on land. .
             The Mesozoic Era was when the continent of Pangaea broke up into smaller continents. This time was greatly known for the number of reptiles. During this time dinosaurs began to evolve and plant life grew with great abundance. There were to types of dinosaurs, plant eaters and meat eaters.


Essays Related to Earth History

1. An Environmental History of theTwentieth-century world-

Indeed, we are not used to study the history of the twentieth century through its environmental history, we most often tell the history of the twentieth century through its wars, its economic and political changes, and trying to explain this history with such a different point of view, could be a very challenging and interesting task. ... In first the author argues that to a degree unprecedented in the human history, in the twentieth century, we have been moving Earth: polluting the atmosphere, the water .Indeed, under the pressure of human activity, the biological diversity is impoverishing...

  • Word Count: 1259
  • Approx Pages: 5
  • Grade Level: Undergraduate

2. What is History

What is History? So, what is History? ... Trevelyan said that "the poetry of history lies in the quasi-miraculous fact that once, on this earth, on this familiar spot of ground, walked other men and women, as actual as we are today, thinking their own thoughts, swayed by their own passions, but now all are gone, one generation vanishing after another, gone as utterly as we ourselves shall shortly be gone like ghosts at cock-crow." ... History Doesn't Change. ... History is a personal subject. ...

  • Word Count: 3114
  • Approx Pages: 12
  • Grade Level: High School

3. The Religious And Scientific Aspects Of Creation

Throughout history, religion has caused much controversy towards the people that were trying to find out the scientific way of creation. ... The formation of a stable water cycle on Earth would come next. ... The next thing that was created was the Earth. ... The Bible tells us that the God just created the earth, but the earth was without form and was void. ... And God said, let the earth bring forth the living creature after his kind, cattle, and creeping thing, and beast of the earth after his kind" (Holy Bible). ...

  • Word Count: 1106
  • Approx Pages: 4
  • Has Bibliography
  • Grade Level: High School

4. Globalization and a United Earth

In the introduction to his book "A Brief History of Neoliberalism," Harvey examines the process in which markets succeed when their governments create an infrastructure that allows individuals to make their own market decisions while simultaneously providing a safety net for those who are less capable. ... Anna Munster's chapter "Welcome to Google Earth," is a case study of the three perspectives discussed above. Technology has allowed individuals to have access to information (as Friedman describes) and, in the case of Google Earth, to a view of the world they live in...

  • Word Count: 1259
  • Approx Pages: 5
  • Grade Level: Undergraduate

5. Foundation and Earth

Isaac Asimovs" novel Foundation and Earth though set in a time so far from our, in a universe with a decaying Galactic Empire and millions upon millions of worlds that have been colonized and taken over by the human race. ... The most obvious problem that Foundation and Earth seems to address as the three unlikely adventures travel out into the universe in search of the "Mythical" Earth, is that of history. Anymore it seems more and more people now less of history. I don't just mean general history such as that of the early American colonies and how they became one of the most, if not the...

  • Word Count: 427
  • Approx Pages: 2
  • Grade Level: High School

6. Differing Cultures, Similar Beliefs

. - Anne Frank Each individual who walks this earth represents a unique system of beliefs. ... For instance, the greenhouse effect is a result of the lack of respect for the earth, an abuse of the human-earth relationship. ... John Neihardt's Black Elk Speaks seeks to carry on the sacred history of the Lakota people. ... I feel that as an American I am responsible for knowing the history of my country. ... Through the reading, I became aware of the traditions of another culture, as well as the darker history of my country. ...

  • Word Count: 964
  • Approx Pages: 4
  • Grade Level: Undergraduate

7. God Exist

The Steady State Theory eventually was relegated to the relic heaps of history. ... If we drew a map of the Milky Way galaxy, and represented the Earth and Sun as two dots one inch apart (thus a scale of one i...

  • Word Count: 2632
  • Approx Pages: 11
  • Grade Level: High School

8. Creation vs Evolution

There are many different theories to the creation of earth and the development of man. ... Scientists say that life started on Earth in one of two ways: either life originated here on Earth from a single cell that had the ability to duplicate itself or life came to earth as a micro-organism via a comet or meteor. ... Life on Earth has evolved into numerous independent life forms. ... Life forms occur as small as a single cell and as large as the entire earth itself. ... Since the Bible is without error, then the creation and early history of the world occurred exactly as the Bible states....

  • Word Count: 614
  • Approx Pages: 2
  • Grade Level: High School

9. Earth In The Balance

Earth in the Balance Earth in the Balance is an environmental outlook on the degradation of our earth. ... Al Gore is a pro-environmentalist who believes that the earth is on the brink of catastrophe. The title, Earth in the Balance, means humanity and earth must be in balance in order for human civilization to exist and live in harmony. ... He says in the earth's history, the modern human race is the only race not to live in harmony with the environment. ... Earth in the Balance may be a little overwhelming and controversial at times, it is nevertheless, a call for hope. ...

  • Word Count: 895
  • Approx Pages: 4
  • Grade Level: Undergraduate

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