Earth Science Rocks Essay

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Creationists And Darwinists
Questions on the origin of life and of the universe must have challenged human curiosity and imagination as soon as early man had time for activities other than survival. In ...
The 8 most common elements in the earth's crust are Oxygen, Silicon, Aluminum, Iron, Calcium, Sodium, Potassium, & ;Magnesium. They compose 98.5% of the total crust. A mineral occurs naturally, is a soli, inorganic, has chemical composition and a crystalline structure. Native minerals are single elements. Compounds are 2 or more. There are more compound than native. You can identify minerals by color, streak, luster, hardness, cleavage, and fracture. Minerals form by magma erupting and forming lava then cooling. They
Rocks and Minerals
According to Webster’s Dictionary, the definition of a mineral is an inorganic substance. Citrine is one of the most popular minerals. It is a variety of quartz. ...
can also form by evaporation of water containing dissolved ions. Silicates are the most common group of minerals found in the earth's crust. The structure of minerals are orderly. They form crystalline. A crystalline has flat faces and smooth surfaces. Igneous rocks are formed from magma. If they are intrusive (plutonic), they have large crystals and cooled slowly. If they are extrusive, they cool quickly, have fined grain. The scheme for igneous rock identification is based on texture, color, composition,
Rocks And Minerals
According to Webster’s Dictionary, the definition of a mineral is an inorganic substance. Citrine is one of the most popular minerals. It is a variety of quartz. Citrine is a ...
and density. Sedimentary rocks are the 2nd step in the rock cycle. They are composed of bits and pieces of rock that have been watered by rain, water, and other things. They compress and cement on top of each other forming layers. When the water evaporates, the sediments are left behind and forms a new rock. This rock is either clastic (formed from igneous rock) or organic (formed from living remains). The other type of sedimentary rock is chemical which
ABSOLUTE AGE OF ROCK
CHRIS LEIBROCK SHAWN GOLSTON EARTH SCIENCE MR. FRENCH PERIOD # 3 9 - 11 - 00 ABSOLUTE AGE OF ROCK ROCKS ARE AN INTERESTING BUT MYSTERIOS THINGS ...
is formed by the evaporation of water and the precipitation on sediments form a new rock. Metomorphic rock is the recrystalization (change w/o melting) of rocks under extreem heat and pressure. Regional metamorphism occurs over large arieas where mountain building has taken place. Comtact metamorphism occurs when molten magma comes into contace w/ sourounding rocks.
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