Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Earth Materials
Document related concepts
no text concepts found
Transcript
Earth Materials Minerals • Naturally occurring, inorganic, crystalline solid that has a definite chemical composition Naturally Occurring • Formed in nature and not by people Inorganic • Is not made from or composed of life forms Crystalline • Has a specific arrangement of atoms IAOA • The Internal Arrangement Of the Atoms specify the physical and chemical properties of a mineral What 2 elements make up most of Earth’s Crust? SILICON and OXYGEN Silicon and Oxygen combing to form…. Silicates (SiO4) Silicates hey also form a very SPECIFIC STRUCTUR Silicon-oxygen tetrahedra are the basic building blocks for silicate minerals How can we identify a mineral? PHYSICAL PROPERTIES COLOR VERY POOR indicator because the SAME mineral can be the DIFFERENT colors COLOR COLOR VERY POOR indicator because DIFFERENT mineral can be the SAME colors GOL D PYRITE STREAK The powder form of a mineral Much more reliable than color LUSTE R How LIGHT reflects off a minerals Examples: Glassy, Metallic, NonMetallic Cleavage the mineral breaks in a predictable pattern because of its arrangement of atoms CLEAVAGE FRACTU RE The minerals breaks randomly HARDNESS RESISTANCE to being scratched Not the same as breaking For example: You can easily break glass with steel, but steel WILL NOT scratch glass HARDNESS MOHS SCALE
