خریدار گرامی شما میتوانید فایل (What is Geophysics) را ویرایش کنید.

What is Geophysics - word (..doc) - دانلود,مقاله,What,is,Geophysics,دانلود

قسمتی از متن :

‏1

What is Geophysics?

Volatiles & melt rising from subducted ocean plate

Geophysics investigates the fundamental structure and evolution of our planet. It involves the application of physical principles to the study of the Earth, and, increasingly, the other planets.

Geophysics concerns some of the most violent of phenomena - earthquakes capable of causing hundreds and thousands of deaths, the birth and destruction of planets, volcanic eruptions - and some of the apparently most gentle - the movement of the tectonic plates at the Earths surface by only centimetres per year, the movement of the direction in which the compass needle points by hundreths of degrees per year, the gradual rise of land once covered by ice sheets.

That all these processes are related to each other, and require study from the microscale to planetary scale, and on time scales of milliseconds to billions of years, is what makes geophysics so exciting and challenging

‏3

Geothermal Energy

Geophysics comes into its own in investigating parts of the planet that cannot be observed directly. The deepest mines and drillholes penetrate only 10km into the Earth; this accounts for less than half a percent of the Earths volume!

Measurement of physical properties in the laboratory, over the Earths surface, or even from space, such as the strength of gravity, the Earths magnetic field, the temperature under the Earths surface, and most importantly recording of seismic waves created by earthquakes, provide powerful information about how the internal processes of the Earth work, and how they affect us at the surface.

Application of these techniques is vital economically: geophysics provides us with the fundamental tools for oil and mineral exploration, and is increasingly important in environmental applications. It is also very important politically: the nuclear test ban treaty is policed by looking for the seismic signatures of atomic bombs, and geophysics also makes important contributions to the study of global change.

تصاویری از چند صفحه نخست فایل :

توجه فرمایید بدلیل تهیه ی تصویر با نرم افزار های خارجی متن نمایش داده شده در تصاویر ممکن است دارای اشکالاتی در نمایش برخی حروف باشد که در فایل اصلی بدون مشکل است