How many layer that our earth have?

u can't count them.How many layer that our earth have?
we have 3 layers of earth the crust, mantle and the core(inner core and outer core) Report Abuse
How many layer that our earth have?
In very basic terms, 3.


The crust - outer layer


mantle - the mid layer


core - the centre of the earth





There are many more layers, but this is a simplified view
a lot
Not including the atmosphere the earth is divided into four main layers: the inner core, outer core, mantle, and crust. The core is composed mostly of iron (Fe) and is so hot that the outer core is molten, with about 10% sulphur (S). The inner core is under such extreme pressure that it remains solid. Most of the Earth's mass is in the mantle, which is composed of iron (Fe), magnesium (Mg), aluminum (Al), silicon (Si), and oxygen (O) silicate compounds. At over 1000 degrees C, the mantle is solid but can deform slowly in a plastic manner. The crust is much thinner than any of the other layers, and is composed of the least dense calcium (Ca) and sodium (Na) aluminum-silicate minerals. Being relatively cold, the crust is rocky and brittle, so it can fracture during earthquakes.





As to the atmosphere





Troposphere


The troposphere starts at the Earth's surface and extends 8 to 14.5 kilometers high (5 to 9 miles). This part of the atmosphere is the most dense. As you climb higher in this layer, the temperature drops from about 17 to -52 degrees Celsius. Almost all weather is in this region. The tropopause separates the troposphere from the next layer. The tropopause and the troposphere are known as the lower atmosphere.





Stratosphere


The stratosphere starts just above the troposphere and extends to 50 kilometers (31 miles) high. Compared to the troposphere, this part of the atmosphere is dry and less dense. The temperature in this region increases gradually to -3 degrees Celsius, due to the absorbtion of ultraviolet radiation. The ozone layer, which absorbs and scatters the solar ultraviolet radiation, is in this layer. Ninety-nine percent of ';air'; is located in the troposphere and stratosphere. The stratopause separates the stratosphere from the next layer.





Mesosphere


The mesosphere starts just above the stratosphere and extends to 85 kilometers (53 miles) high. In this region, the temperatures again fall as low as -93 degrees Celsius as you increase in altitude. The chemicals are in an excited state, as they absorb energy from the Sun. The mesopause separates the mesophere from the thermosphere.





The regions of the stratosphere and the mesosphere, along with the stratopause and mesopause, are called the middle atmosphere by scientists. This area has been closely studied on the ATLAS Spacelab mission series.





Thermosphere


The thermosphere starts just above the mesosphere and extends to 600 kilometers (372 miles) high. The temperatures go up as you increase in altitude due to the Sun's energy. Temperatures in this region can go as high as 1,727 degrees Celsius. Chemical reactions occur much faster here than on the surface of the Earth. This layer is known as the upper atmosphere
It Is said that the earth has 4 layers but if you include the crust it is 5. The layers from the centre are: The inner core, the outer core, the lower mantle, the upper mantle and the crust.
It has five main layers. From the inside out:





Inner core


Outer core


Mantle


Crust


Atmosphere





JMB
Are you a functional illiterate or do you just write like one?





What do you mean ';how many layer';?... can you put this in english so I can try to answer it?
Please visit this URL to know about earth. Ctrl + click


http://asia.pg.photos.yahoo.com/ph/quake
Our earth is broadly divided into 4 layers;they are ;





Crust-outermost layer.





Asthenosphere-layer between crust and mantle.





Mantle-Its the third layer which has molten lava.





Core-It is the core of earth.It contains molten iron which is the cause of earths magnetism.This layer is above 3000C.
The earth has a outer core which is the crust which we live on, inner core that is molten rock, and last the inner core which is solid Fe. We have Three layers!