The Earth’s layers can be categorized mechanically or chemically. The chemical classification is more simple and includes the inner and outer core and the mantel which is divided into the upper and lower mantle. The crust is the surface. However, in the mechanical classification divides the lithosphere, the asthenosphere and the mesospheric. It is important to have the mechanical classification to understand the forces that move the tectonic plate.
Well to find this out you need to make an equation
s+7=j So for example if Johnny's sister is 15 then Johnny would be 22 because s(sister's age) +7(number of years difference between their ages)=22(Johnny's age)
Green plant absorb carbon dioxide that are being released into the atmosphere by man or other living organism and they respire or release oxygen back into the environment as their own waste product. This oxygen plays a vital role in human respiratory system.
