Study on the structure of the worldScientists have been trying to find methods that will be used to study the structure of the world, both directly and indirectly, by trying to use evidence that is capable of discovery, including the main branch of the scientific theory and modern technology in order to answer these questions.300 years ago, when Sir Isaac Newton had discovered how to calculate the mean density of the Earth. There are approximately twice the value of the density of rocks on the surface world. Shows that within the world consists of substances that are more on the surface of Earth density.The next 100 years, a wide variety of disciplines tries to research scientists and explore to find knowledge about the structure of the world, from things that burst out of a volcano, which is evidence that indicates that inside the world of heat and pressure that is melting rock. Moments after that, until now. Mine is deep and the temperature inside the borehole image 1.1, which found that the higher the temperature within the world according to the depth from the surface of the Earth because there is no technology in the current down to collect a sample and measure the environment under very deep world. However, humans are also trying to find information about the structure of the world, directly from multiple methods. For example, studies from drilling survey. The study of stone series highlights video filet-o (as in the past, of the rock group Ocean crust, but currently found on Earth). A study of volcanic rocks. Study on the chemical components of the bat that falls on Earth UMA taka and sample rocks from the Moon, etc.It is also used to study the structure of the world by way of indirect share, which is the study of the properties within the world based on scientific principles, such as the study of seismic waves from an earthquake. Man-made waves (nuclear blast trial) and measure the surface area of the Earth gravity, etc. The students thought the use of seismic waves properties geologists to study the internal structure of the Earth?
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