| English | Spanish |
| atmospheric structure The gaseous area surrounding the planet is divided into several concentric spherical strata (layers, like shells) separated by narrow transition zones. The boundaries are know as "pause". More than 99% of the total atmospheric mass is concentrated in the first 40 km from the Earth's surface. Atmospheric layers are characterized by differences in chemical composition that produce variations in temperature | estructura atmosférica |
| chemical structure | estructura química |
| chemical structure The arrangement of atoms in a molecule of a chemical compound | estructura química |
| economic structure The underlying framework, including transportation and communications systems, industrial facilities, education and technology, that enables a country or region to produce goods, services and other resources with exchange value | estructura económica |
| metalplastic compound structure | estructura metaloplástica |
| metalplastic structure | estructura metaloplástica |
| protective structures | obras de protección |
| temperature structure of the atmosphere | estructura térmica de la atmósfera |
| trophic structure | estructura trófica |