Astronomy Essay Example | Topics and Well Written Essays - 500 words - 4

Astronomy - Essay Example If earth’s internal activities are related to solar energy, then other planets also should have such internal activities. â€Å"The earth grew from the accumulation of planetismals (meteorites and asteroids), over a period of 1-200 million years about 4.3 to about 4.5 billion years ago. All of the geological activity on the earth today is driven from this initial source of heat at the earths formation, aided and abetted by continued radioactive decay of elements in the earths interior.† (The Heat History of Earth) The construction of earth is not homogeneous and different parts of earth have different types of layers and even the materials are different at different locations on earth. For example the soil structure of India and that of America are entirely different. Earth is blessed with so many radioactive elements like Uranium, Radium, and Plutonium which are decaying continuously liberating huge amount of energy. More over these elements are not distributed uniformly on earth’s surface and even then earth’s internal activities are distributed evenly everywhere. So we can concl ude that the internal activity of earth is not because of radioactive decay of elements alone, but it was due to the initial source of heat at the earth’s formation also. It is an accepted fact that earth’s internal activity has risen in the recent past. It is evident from the increased number of earth quakes, and volcano eruption. Once the earth’s internal activities finished, there will be no more earth quakes, tidal waves and volcano eruption and the earth becomes cooled to alarming levels so that its biological activities will also be ended along with the geological activities. â€Å"There is much evidence that indicates geological vitality of a planet which has played a fundamental role in the development and evolution of life.† (Frias) It is evident from the fact that no other