miércoles, 17 de octubre de 2012

This Map is a fully editable, layered Adobe Illustrator file. Adobe Illustrator files are vector format files, allowing for high-quality artwork at any magnification. All major feature class is located on its own layer.

viernes, 5 de octubre de 2012

The water cycle


Earth's water is always in movement, and the natural water cycle, also known as the hydrologic cycle, describes the continuous movement of water on, above, and below the surface of the Earth. Water is always changing states between liquid, vapor, and ice, with these processes happening in the blink of an eye and over millions of years.