rock cycle: igneous rocks are formena by cooling and crystallization of magma. Earth's surface exposed to the action of weathering agents, decompose. weathering products are transported and sediment deposits. during and after deposition is verified lithification process, in which the sediments become sedimentary rocks. these buried deep underground, under penetrated by high temperatures and chemically active gases and solutions are transformed into metamorphic rocks. metamorphism in the rock does not melt, but the minerals that make change shape and often in nature. if the rock comes to melt originates magma.este, cooling, and igneous rocks produces a new cycle begins. the cycle can be interrupted in its course and follow via some of the broken arrows interrupted.

for recognizing physical properties of minerals: color: to determine the color of the mineral, using a plate or biscuit porcelain, which, to rub the mineral leaves a streak or not corresponding to its true color. luster : Also called gloss, is a property that can identify certain minerals. is the reflective power of the mineral surface when light shines on it, can be metallic, grso, mate and others. translucency: property possessed by certain minerals allow the light more or less easily into your traves.segun is the degree of intensity with which light enters the inside, and with the ease that we can see objects through it, one can distinguish 4 types of pellucid: clear, semi transparent, translucent, opaque. thermoluminescence: property, for several minerals emit light when heated at various temperatures. triboluminescence: A property that affects some minerals to become bright, either through friction, by percussion or reducing them to dust. Fluorescence: A property that have certain minerals emit light when subjected to ultraviolet rays. phosphorescence: the property possessed by some minerals continue to emit light radiation when subjected to ultraviolet rays. exfoliation: dependent property of certain minerals that provide cohesion when hit (percussion) or pressure (when we apply certain eg force, pressure with the razor's edge) of separare in sheets or pieces of flat surfaces called exfoliation cruises.

uses of minerals: quartz: uses in jewelry, optical devices, electronic. graphites: lubricants, pencils and paint. Halite: food chemical manufacturing. Yeso: CONSTRUCTION materials. Diamond: elements of cutting, polishing, drilling and jewelry.

monsoon: change of direction occurs periodically in connection with each investment in the form of violent storms. are the Asian continent. from November to March winter monsoon cold and dry, blowing from the continent to the sea (northeast-southwest) in March or April is changing direction and blowing with violence of evil to the mainland, is the summer monsoon is hot and humid.

air fronts: when 2 air masses of different densities and temperatures are in contact, form a front that is a surface of discontinuity. cold front, advancing under a warm air mass and ejected forward or upward. warm front: greater speed and moves behind or below the mass of cold air. occluded front: there are 3 forms when masses of cold air 2 and between the cold hot. latter loses contact with the ground and rises above the cold air.

secondary minerals: supergenes or minerals are the result of the alteration of primary minerals in surface areas of the earth's crust.

Accessory minerals are those that occur in small cantiades and do not influence the character of the rock. if they are present in sufficient quantities to warrant mention are called minerals characteristic example is a characteristic mineral olivine in the olivine basalt or olivine gabbro.

metamorphic: foliate the first show leafy structures or slate or schist. foliate not: do not have this feature.