Earth: Geosphere
![Image](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgH1ZxqdkSQsipHreqK_StMGwTj85-wU1Lh8z4Cc_Zo9oQq5r6Dcgf5RCWxcM6nSHKzOJNXIiRu4puOGxBnYY5jOIPcGMsaN3r_dvhHTngELk76Zqw6R0IMqdsPVjNZ_8PAaA_ADbF7oOMMVP4Z5VTZ4UhdBPr5tVvQ1ZiQB-fCYr7Kr9uxdC_j-9GB5r0/s320/EARTH-SPHERES-GEO.png)
The geosphere is the solid part of the Earth that includes the crust, mantle, and core . It also includes the molten rock and heavy metals in the deep interior of the Earth, as well as the fossils and skeletons of animals that may become preserved over time. The geosphere interacts with the other spheres in various ways, such as through plate tectonics, volcanism, erosion, weathering, and sedimentation. The geosphere can be divided into several layers based on their physical and chemical properties. The outermost layer is the crust , which is composed of rocks and minerals that form the continents and ocean floors. The crust ranges from about 5 to 70 km thick and makes up less than 1% of the Earth's mass . The crust is divided into two types: continental and oceanic . The continental crust is the outermost layer of the Earth's surface, composed mainly of granitic and sedimentary rocks. It is thinner under the oceans and thicker under the