Saturday, November 3, 2012

The Rack cycle


-->
The rock cycle is the process that take a long time. The magma happen by the force of gases through a mountain, which is mostly referred as Volcano. when magma comes out of the volcano, it's called lava. Because of the different temperature , the lava solidifies and become solid. And became a Igneous rock. Igneous rock can be of two types,  intrusive that has big crystals and extrusive that have small crystals. That affected by weathering and erosion, the rocks break down to small sediments. Then sediments come through processes that called compaction and cementation, Then  became a a Sedimentary rock. The rocks made up of three types , clastic that is formed by cold lava, bioclastic that is formed by death organisms.The Metamorphic rock is formed by heat and pressure of other rocks. This how the rock cycle keeps working.



The following is a listing of the minerals of the Mohs scale and their rating:





The following physical properties of minerals can be easily used to identify a mineral:

Luster: Metallic - look like mineral the non- Metallic  does not look like mineral

Color: What the mineral look like

Streak: The powder that left by the mineral

Hardness : How hard the mineral  is from (1)  to (10)

Cleavage: Mineral that is cut easy

Fracture: Mineral that break uneven

Composition: what the mineral made of

Other properties: the description of the mineral smooth, rough , shining , sparkles clear






No comments:

Post a Comment