The study of the world,
scientists have tried to find ways. To study the world both directly and indirectly. By attempting to use evidence You can find it The theory Different branches of science And modern technology To answer such questions,
300 years ago, Sir Isaac Newton discovered how to calculate the average density of the Earth. Was estimated to be 2 times the density of rocks on the surface. Show that the world is composed of a substance with a density greater than on the surface next to the next 100 years, scientists multidisciplinary research effort to explore and learn about the world of things that erupted from the volcano. This is strong evidence to indicate that the area within the world of heat and pressure to be the molten rock. From then until the present time. The temperature inside the hole drilled deep mines and Figure 1.1, which shows that the global temperature increase with depth from the surface because there is no technology that will go down in the current sample. And measurement environments in the world, has more depth. However, men also are trying to find information about the world from many different ways such as a study of exploratory drilling. Education rock outfit Ophiolite (a rock group in the past. Of the ocean crust It is found on the earth), the volcanic rocks. The study of the chemical composition of the asteroid that fell on the industry. And rock samples from the moon Etc. It is also used to study the Earth indirectly involved. Study of the Earth, which is based on scientific principles, such as the study of seismic waves generated by earthquakes. A man-made (nuclear) and measuring gravity at the Earth's surface and so they think that geologists use seismic properties to study the structure of the world.
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