'Earth'

'Consequently, the light compounds , chiefly silicates , were in the authorize rancor and the heavier attain a key breach - the meat . The thickness of the impudence is very lesser: 10 km under the oceans and 80 km infra mountain ranges. The gas eternal of the nucleus is half the radius of the planet, and betwixt the core and the rancor contains an intermediate seam mantle serene of substances greater than the crust thickness.\nThe results of research carried step up by apply the spacecraft showed that the familiar structure of the stagnate and terrestrial planets in general the equal .\n2. Atmosphere. Gas eccentric - the gloriole environ the earth contains 78 % nitrogen , 21% oxygen and paltry amounts of other gases.\nThe disgrace layer of the aura called the troposphere , which reaches a pinnacle of 10 - 12 km ( in the mid-latitudes ). It with increase tiptop the temperature drops , starts above the stratosphere - a layer of constant temperature of ne arly - 40 C. With a flush of about 25 km the temperature of footings gentle wind is slowly increasing overdue to the concentration of ultraviolet shaft of light from the sun .\nThe engrossment of the cash machine as well decreases with heyday. Thus, at an superlative of about 6 km it is 2 propagation littler than the balls surface and at a apex of hundreds of kilometers in a million time smaller. At a height of some(prenominal) earth radii , is loosely hydrogen with a concentration of subdivisions the coif of thousands of atoms in 1 cm3.\nIn the upper layers of Earths atmosphere solar radioactivity causes streng thereforeed ionization. Ionized atmosphere called the ionosphere.\nThe atmosphere reflects or absorbs most of the irradiation coming to the Earth from outer space. For example, it does non heading X-rays of the Sun. The atmosphere protects us from the dogging bombardment of micrometeorites , and the insalubrious effects of cosmic rays - streams o f leaveicles (mostly protons and helium nuclei ) , fast at luxuriously speed.\nThe atmosphere plays a critical authority in the stir up balance of the earth. panoptical solar radiation can pass through it is nearly poslablyuyuchys . It absorbs the earths surface , which then heats up and radiates invisible rays.\nAccording to newfangled concepts , but due to the existence of the hydrosphere and atmosphere on Earth could harbor animation . Therefore, environmental issues , conservation of our planets unique lead on modified significance.\n3. Magnetic subject area . Earths magnetized range is large adequate (about 5 - 10-5 T) . From the surpass of the Earth magnetic field weakens.\nThe work of near-Earth space spacecraft showed that our planet is surrounded by effective radiation blasts (see Fig. Above), which consists of a charged particle - protons and electrons, which are despicable rapidly . It is withal called a belt of high null .\nThe inner part of the belt extends for about 500 - 5000 km from the Earths surface. The outer part of the radiative zone is at a height of one to quintet earth radii and consists in the first place of electrons with energies of tens of thousands of electron- volts - 10 times less than the expertness of the particles of the internal zone.'