Earth Internal Structure!
Work made by: Sofia, Teresa and David
How do methods direct meet allow Earth's internal structure ?
The direct study of the Earth is diffi cult due to increased temperature and pressure with depth , therefore began to use various direct methods provide the se data from direct observation of rocks and geological phenomena . The only rocks that can directly study is the crust.
How are indirect methods allow conheçer the Earth's internal structure ?
In addition to direct methods, which meet only allow the Earth's surface , are indirect methods , such as gravity , geomagnetism , the geothermometry and the study of behavior of seismic waves , that allow studying the inaccessible areas of the earth
Unit 1 - Write the Unit Title here
Geomagnetism and Gravity
Book Name here
Gravity is the measure of the acceleration of gravity - attraction that the earth exerts on the bodies to the surface . The gravimetric measurements show that the density of the material inside the earth varies. The gravity meters are devices that measure the acceleration of gravity .
When the material is denser ( gold), the acceleration of gravity is higher and the gravimeter metal mass is more attracted to the Earth's surface , stretching the spring .
The Geomagnetism compares the Earth to a giant magnet. This magne tic behavior detected by the compass , suggests that within the Earth must exist metals in liquid moving.
The geothermometry studies the temperature variation inside the Earth . In mining operations it is found that the temperature aumunta with depth.
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