Essay on Popular Theories of the Origns of Life on Earth

Scientists have found that the Earth was formed about 4.6 billion years ago by collisions in the giant disc-shaped cloud of material that also formed the Sun. As gravity slowly gathered this gas and dust together into clumps, it became asteroids and small early planets called planetesimals. These objects collided repeatedly and gradually got bigger, building up the planets in the Solar System. Although scientists are very close to answering the question, they still continue to search for the exact answer to how the Earth was created. With all the evidence presented, it is hard to refute from scientific theories. This becomes cumbersome to many religions because in their eyes God has always been the creator of the Earth.

Stanley Miller started the idea that life could have started when carbon and other ingredients combined. He assembled a contraption made out of flasks and tombs in the lab. He fill one flask with gases to represent Earth's primitive atmosphere and connected that to another flask with water to represent the ocean. He put an electric charge through that.simulated lightning going through early atmosphere. After a couple of day, all this brown goo all over the reaction vessel. He said, now he had amino acids in the vessel. Amino acids are compounds that are form when carbon and other elements linked together. They are building block of protiens and cell, which were vital ingredients of all living things. His experiment showed that life can be formed in the harsh condition of early earth.

The evolution of that formation created the world we live in today. The earth has been in existence for a little over four point five billion years to be exact. The earth shares a story that we are still exploring. From its colorful coral reefs in bright and vibrant

Stephen Jay Gould in his article "The Evolution Of Life On Earth" aims to clarify the misconception of natural selection as the sole reason for evolution. Yet, he emphasizes on the presence of other causes and the complex unforeseeable nature of the universe that can not be explained in one theory. Even though the article is concerned with a deep scientific subject and factual information, we see the usage of description in every sentence. Description has an intrinsic role in this article where the uniqueness and the beauty of the language relies on the strong descriptive construction. It employs the power of the language and the readers senses to bring life to the subject. It also simplifies it by liking the described setting or object to something else that the readers are easily able to visualize and associate in their minds. In addition, using specific descriptive words make a statement more dynamic and effectual to the readers convincing them and inviting them to see the situation from the author perspective.( to help convince the reader and strengthen the argument of the author). It could exaggerate the details to effect the readers in a more emotional way and capture their attention. This won 't only engage the targeted audience, but it will allure other readers as well.

Major Geological Event: The Earth was formed by gravity pulling debris into a swirling mass of rock, radioactive decay and rock impacts generated large amounts of heat melting the planets together. Gravity allowed it to gain the spherical shape it has. Materials in higher density formed the core (Iron, Nickel) while materials in lower density became the mantle and crust. Tectonic plates moving around so much made Volcanoes and the gasses released slowly formed the atmosphere. First signs of life increased the oxygen content, and in turn caused Oceans to form from the rain.

The Earth began several billion years ago, but just six thousand years ago history began to be recorded by people, and only 500 hundred years ago, European conquerors set off into the world, forever changing the balance of the entire planet. 225 million years ago the supercontinent began to drift apart and formed Eurasia Africa Australia and the Americas. It opened up the Atlantic and Indian Ocean as well as narrowing the Pacific Ocean. However land masses and coastal ranges developed at separate times . Basic geography of North America was formed 10 million years ago. The modern geography of the earth however was created by the great ice age 2 million years ago.

The Earth formed 4.6 billion years ago through collisions in the giant disked shape cloud created from the Bing Bang. It is a dynamic planet, with

Firstly, to deduce how the Earth came to form the structures we know today in modern Earth, we must go back

In the beginning, impacts of very large objects were very common, some as big as Mars or half the diameter of Earth. Collision of large bodies orbiting Earth played a role in its initial tilt of spin axis, the length of its day, direction of spin, and the thermal state of the interior. This violent bombardment continued for 3.9 billion years. Final composition of Earth had several crucial structural effects. Enough metal was present early on to allow formation of an iron and nickel rich core that is partially liquid. This enables a magnetic field that deflects some harmful radiation from reaching the surface. Enough radioactive elements are also present in the core to maintain long term heating which drives plate tectonics. At 4.5 billion years ago, Earth separated into different layers: an inner core (made of iron and nickel), a land layer of lower density material, and an early atmosphere of carbon dioxide and steam. At 3.9 billion years ago, surface temperatures dropped to a range where liquid water could be maintained. Liquid water makes up approximately 75% of the planet's surface today which is roughly what it was then. The most important requirement for life as we know it is the presence of liquid water. This is the one substance that can serve as a universal solvent - that is, it can dissolve and transport minerals and

asteroids, meteors, etc, life forms on Earth could have developed as a result of unintentional microorganism contamination. This idea implies that microorganisms can successfully survive in space, and if subjected randomly to ideal conditions evolution can occur. Evidence for this theory is also relatively strong as tests done on the Murchison meteorite which fell near Murchison, Australia in 1969 revealed it contained over 90 different amino acids (among which nineteen are found in Earth life). Although Panspermia does not directly explain the origin of all life (only its distribution) the synthesis of microorganisms in space could also be justified. If certain compounds were subjected to conditions similar to those of the Miller-Urey experiment, ultraviolet light could be substituted for lightning as a chemical reaction

He proposed that that life was formed by the hydrothermal vents on the ocean floor.They require and live on chemical energy to host many different organisms. Swarms of bacteria grew and survived on gases produced by the vents. Wachtershauser said that a biochemical cycle grew and created the first ever cell. The evidence Wachtershauser came up with was: Hydrothermal Vents make pyrite which collect and accumulate simple compounds such as carbon dioxide, monosaccharides, and organic acids. Therefore, the abundant pyrite, which was a compound, started a chemical reaction. Scientists have proved amino acids will gather on pyrite, but not much more reasoning can be found. There were no experiments involved in this

According to scientists, they believe that the earth is 4.5 billion years old. They also believe that life,water,and oxygen got to Earth by meteorites. But the question is how did this happen ? Well let’s start with how they know how old the earth is. In 1897 Ernest rutherford came up with an idea that would change the world forever. The idea? Radioactive decay. Radioactive decay allows us to tell how old rocks are. So when people used this theory on rocks that were found in porpoise cove near hudson bay they were amazed at how

According to astronomical research and geological evidence, scientist indicate the universe is approximately thirteen thousand eight hundred and twenty billion years old. The first link to humanity started with a primate group called Ardipithecus. While our ancestors have been around for about six million years, the modern form of humans only evolved about two hundred thousand years ago. The age of the Earth is estimated about four point fifty four billion years because that is the age of the oldest rocks with fossil evidence of life on earth. The oldest rocks on Earth found to date are the Acasta Gneisses in northwestern Canada near the Great Slave Lake, which are four point three billion years old. The study of the origin of life on Earth, more specifically abiogenesis, is the natural process of life arising from non-living matter. Life on Earth is believed to have began from organic compounds about three point eight to four billion years ago. Despite several competing theories for how life arose on Earth scientist only know when life first appeared on Earth and are still far from answering how it appeared. Since it is hard to prove or disprove them, no fully accepted theories of the origin of life exists.

The Origin of Life When considering the many theories involving “How life began” You must not consider a few main theories but a few main theory groups. Because there are literally hundreds of theories on this subject which can be grouped in to three main categories and then in to various sub categories. 1) Creation science This consists of about twelve theories that are based on the book Genesis all slightly varying in their interpretation. These can be split into two main groups, New and Old earth creationists.

In the beginning the earth was hot and pure lava, then it became covered with