Unit 2: Earth Materials LAB: 2-3 Igneous Rock Identification Vocabulary: Igneous: Produced under the conditions involving intense heat. Intrusive: Igneous rock that forms beneath Earth’s surface. Extrusive: Igneous rock that forms at the Earth Surface. Felsic: Igneous rock rich in potassium feldspar and quartz and light color. Mafic: Igneous rocks that are rich in dark Plagioclase feldspar‚ pyroxene and
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History of Rock Worksheet Write a 500- to 750-word explanation regarding the role of plate tectonics in the origin of igneous rocks. | Plate tectonics play a major role in the origin of igneous rocks. Igneous rocks are called fire rocks and are formed either| |underground or above ground. Underground‚ they are formed when the melted rock‚ called magma‚ deep within the earth becomes trapped| |in small pockets. As these pockets of magma cool slowly underground‚the magma becomes igneous rocks
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At a granular level‚ rocks are composed of grains of minerals‚ which‚ in turn‚ are homogeneous solids formed from a chemical compound that is arranged in an orderly manner. The aggregate minerals forming the rock are held together by chemical bonds. The types and abundance of minerals in a rock are determined by the manner in which the rock was formed. Many rocks contain silica (SiO2); a compound of silicon and oxygen that forms 74.3% of the Earth’s crust. This material forms crystals with other
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the Earth’s crust‚ rock is usually defined as a mixture of common minerals. Rocks can be hard or soft‚ as small as a grain or as large as a building. They have been an integral part of the history of mankind‚ first being used as tools for hunting and defense‚ and as a building materials to construct shelters and monuments. Combined with the effects of tectonics‚ weathering and vegetation‚ rocks define the natural landscapes we see around us. The minerals and metals we find in rocks are essential to
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WHAT ARE ROCKS? What are Rocks? Making up most of the Earth’s crust‚ rocks are usually defined as a mixture of common minerals. Rocks can be hard or soft‚ as small as a grain or as large as a building. Combined with the effects of weathering and vegetation (vegetation can also weather rock as the tree or bush is "yanked" out of the ground by forces of wind or by merely falling over after it has died. Root systems tend to go under the surface and attach themselves to
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The rock cycle is very important to us because it explains the way the different types of rocks are formed on earth. Geologists classify rocks in three groups‚ depending on the Earth processes that made them. Some rocks are formed by heat and pressure. Other rocks are formed by weathering and erosion. The three rock groups are igneous‚ sedimentary‚ and metamorphic rocks. Igneous rocks are formed from melted rock that has cooled and solidified. They can form underground or above ground. Underground
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The rock cycle is very important to us because it explains the way the different types of rocks are formed on earth. The rocks currently visible on the Earth’s surface have moved through transition stages that transformed them from one form into another. The importance of the rock cycle lies in how it forms and recycles the various layers that make up the Earth. To do this‚ the cycle moves through three different stages that produce three different types of rock. Igneous rock makes up the foundation
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Formation of Rocks The three main ways rocks are formed: • Sedimentary rocks are formed through the gradual accumulation of sediment: for example‚ sand on a beach or mud on a river bed. As the sediment is buried it is compacted as more and more material is deposited on top. Eventually the sediment will become so dense that it is essentially rock. This process is known as lithification. • Igneous rocks are rocks which have crystallized from a melt or magma. The melt is made up of various components
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The Rock Cycle & Classification of Rocks The rock cycle is the formation‚ breakdown and reformation of a rock as a result of sedimentary‚ igneous‚ and metamorphic processes. The rock cycle is an illustration that is used to describe how the three rock types are related and how Earth processes change a rock from one type to another over time. Each group contains a collection of rock types that differ from each other on the basis of the size‚ shape and arrangement of mineral grains. Due to the driving
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THE ROCK CYCLE ● ● ● ● There are three main types of rocks: igneous‚ sedimentary‚ and metamorphic. Each of these types of rocks are formed in different ways and each type of rock can be changed into the other types of rock. This process is called the Rock Cycle. The rock cycle is the process that makes and recycles rocks. IGNEOUS ROCKS ● ● ● ● ● ● Igneous rocks are formed from magma. Magma cools and solidifies into rock. When igneous rocks are exposed on the surface‚ time and weather break the
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