Senin, 19 Maret 2012

HOW DID EARTH GET HERE ?


Of all the questions that humans face, the question of how the Earth formed is one of the most challenging, and different theories that human beings have been formed over the years on creation of the planet is often generated much controversy.
While scientists today believe that they finally found the answers to the most basic question, it is important to remember that the previous generations, people and culture they assumed that the answer to this question is correct in their day as well. Here is some basic information about the most popular theory of how the Earth formed.
Development of our planet began about 4.6 billion years ago, and the Earth has undergone a startling change in geology since then. Earth has existed in some form for about a third of the history of the universe itself. Our home planet formation starts with the early Hadean era, in which a  

variety of solar debris accumulates into a world that is increasingly crowded.
Very little of it exists in its original form today, but scientists have concluded that the main ingredient is the bedrock and the crystal. At some point during this era, the young Earth to form the first coat just before colliding with another large protoplanet, and many of the problems on our planet was formed by this event. In the chaos that followed, the Earth is setting the violence that is constantly bombarded by meteorites and volcanoes was rocked by a great and constant.
As the planet cooled, and things began to settle, the Earth entered the Archaean era. It was during this period that our atmosphere was created, but the total absence of the ozone layer and the scarcity of oxygen means that it will be a difficult place to survive. However, the first fossils began to emerge during this time, and with it the story of life on Earth began. At this time, the Earth is big enough to pull the building blocks of life to the field of gravity, and accumulation of water started to create a big ocean and sea.
In these waters, life is slowly growing, and the possibility that the early days of evolution, including the world's lifeforms are even more diverse than the world today. Some lifeforms found a way to build and store energy through the use of sunlight and the abundant carbon dioxide, and oxygen created by the basic form of photosynthesis is allowed to continue down the path of evolution for the curious.

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