Skip to main content

You should know the facts of Earth's Interior. What is the radius of The Earth?

Facts of Interior of the Earth        


     The earth's radius is 6370 km. No one can reach the centre of the earth and make observation or collect samples of the materials. Under such conditions it is wonder to know how scientist tell us about the earth's interior and the type of materials that exist at such depths. Basically the sources of information about the interior of the earth are two types. These are- 1. Direct Sources, 2. Indirect Sources. The most easily available solid Earth material is surface Rock On The Rocks we get from mining areas. Gold mines in South Africa sdps 3-4 km. Going beyond this depth is not possible as it is very hot at such depths. Besides mining, scientists have taken up a number of projects to explore the conditions in the crystal portions. Scientist world over are working on two major projects such as deep ocean drilling project and integrated Ocean drilling project. The deepest drill at Kola in Arctic Ocean has so far reached at depth of 12 kilometre. This and many deep drilling projects have provided large volume of information through the analysis of materials collected at different depths. Volcanic eruptions forms and other sources of obtaining direct information. As and when the molten material aur Magma is thrown onto the surface of the earth, during volcanic eruption it becomes available for laboratory analysis. However it is difficult to ascertain the depth of the source of such magma.
              Indirect services include gravitation magnetic field and systemic activity. The gravitational force is no the same at different latitudes on the surface of the earth. It is Greater near the poles and less at the equator. This is because of the distance from the centre at the equator be greater than at the  poles.  The gravity also different according to mass of material. The reading of the gravity at different places is also affected by many other factors. These readings differ from expected values. Such a difference is called gravity anomaly. The gravity and provide information about the distribution of the mass of material at the crust of the earth. Magnetic surveys also provide information about the magnetic activities in the crustal portions of the earth, and thus, it provides information about the distribution of materials in this part.  The siesmic activity is one of the most important about the interior structure of the earth. It is caused due to the released of energy which generates web that travel in all directions. The release of energy occurs along the fault. A fault is a short break in the castle rocks. The point where the energy is released is called the focus of an earthquake. It is also known as hypo centre. The energy waves travelling in different directions reach the surface. The point on the surface nearest to the focus is called epicenter. It is the first one to experience the Waves. It is a. Directly above the focus.

Comments

Post a Comment

Popular posts from this blog

What is Plate Tectonic? Types of plate tectonics // Plate Margins or boundaries.

Plate tectonics  : The earth's crust is made up of several rigid and a solid plates. The term plate was first used by J. Tuzo Wilson, a Canadian geophysicist in 1965. Plate tectonic means the moment of plates. Classification of plates  : Plates can be classified into two groups, these are- 1. Major plates : a. Indian Plate, b. Pacific plate, c. American plate, d. African plate, e. Eurasian plate, f. Antarctica plate. 2. Minor plates : a, Arabian plate, b. Philippines plate, c. Cocos plate, d. Caribbean plate, e. Nazca plate, f. Scotia plate, g. Carolina plate, h. Juan de puca plate, I. Bismarck plate. Plate Margins : Plate margins or boundaries are most significant because all tectonic activity occur along the plate margins. Plate margins or boundaries are classified into three categories. These are- 1. Constructive or divergent plate boundary : divergent plate boundary in plate tectonic is a linear feature that exist between two plates that are moving away from
Post a Comment
Read more

Infinix hot 8 :- all about this // 4g smartphone under 7000 for Gaming.

Infinix Hot 8 It is very important news for those who are going to buy a smartphone under low price. Now it is possible to buy a 4g smartphone under 7000 along with long lasting battery. Because flipkart is going to lunch a very good looking and gaming mobile called Infinix Hot 8 the price of which is only Rs 6999 in flipkart.         Some highlight features are given below :- 1. This Smartphone has 4g RAM along with 64 gb ROM i.e., external memory. 2. This smartphone has very big hd+display of 6.52  inch. 3. This has a long lasting battery of 5000 mAh Li - ion polymer battery. 4. It has Helio P 22 processor ( MTK6762).       Flipkart is going to lunch this mobile in 22nd January at 12 noon. 
Post a Comment
Read more

What is Isostasy? Meaning and Definition.

              A wide variety of landforms such as mountains, dissected plsteaus, flat plains, low lying Ocean basins, etc. exists on the earth surface. These landforms differ from each other in respect of their size, height, extent, etc., and yet all of them exist in a state of isostatic balance according to a definite law. There must be some unseen force behind creating such balance. It is known as isostasy. Isostasy :                     The word 'isostasy' has been derived from the Greek word 'iso-stasious' which means 'equal position'. In other words the gravitational adjustment of Earth's crust is isostasy, a state of balance. The term isostasy was first used by the famous American geophysicist C.E. Dutton According to him the doctrine of isostasy implies a position or condition of mechanical equilibrium under the control of of natural laws between the high mountain parts and low lying basins and oceanic parts over the rotating Earth. Var
Post a Comment
Read more