Before revision: Earth's spheres Earth science generally recognizes four spheres, the lithosphere, the hydrosphere, the atmosphere, and the biosphere ;Earth 's Spheres .
After revision: Earth's spheres In Earth Science, it is common to conceptualize the Earth's surface as consisting of several distinct layers, often referred to as spheres: the lithosphere, the hydrosphere, the atmosphere, and the biosphere , this concept of spheres is a useful tool for understanding the Earth's surface and its various processesEarth 's Spheres .