Color and luster may seem like the easiest way to identify a mineral, but it is important to consider other factors because many minerals can be a wide variety of colors.
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The color of a mineral in powder form is called its streak, which is more useful in classifying a mineral than its overall coloring. Streak can be found by rubbing the mineral sample across a small piece of unglazed porcelain, which is called a streak plate (Ludman and Marshak 55). One of the best examples of the usefulness of a streak plate is when classifying the mineral pyrite. Pyrite, often called "fool's gold, " has a black streak while actual gold has a gold streak. It is important to remember that a streak plate has a hardness of about 7, which leads to the next important characteristic when classifying a mineral: hardness and breakage (Neyman 2).
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The ability of a mineral to resist scratching and abrasion is known as its hardness. Hardness is one of the most useful properties for identifying minerals, because it relates to its unique atomic structure. According to Stephen Marshak, "The atoms or ions of crystals in a hard mineral are more strongly bonded than those in a soft mineral". Friedrich Mohs, a German mineralogist, worked out a scale of hardness for minerals ranging from 1 to 10 (Neyman 2). The number one is assigned to the softest mineral, Talc and 10 is assigned to the hardest mineral, Diamond. Minerals that are harder than 7 will scratch a streak plate, rather than leave colored powder behind. The softest minerals such as Talc and Kaolinite are used for things like powder and clay, while harder minerals such as Quartz are used for things like watch settings to ensure that they do not scratch easily (Ludman 56). .
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Along with hardness, breakage is a characteristic unique to each mineral. The terms cleavage and fracture are used to describe the way a mineral breaks. Cleavage is the tendency of a mineral to split along smooth, definite surfaces, while fracture is used to describe minerals that break with no smooth planes or patterns (Marshak 133).
Although were you live and how you eat play a major part in your dietary habits, food choices vary from person to person. What people eat affects their health and how they live. ... The number of calories needed each day depends on how much energy your body uses. ... Nutritionists classify different types of dietary fats, or fats in food. ... Minerals are neither animal or vegetable; they are inorganic. ...
How would you classify the bones fractured by Mrs. ... How is the sign or symptom related to these anatomical structures? ... Identify which bone cell is responsible for this process and explain how it occurs. - This process is called ossification, and is done with osteoblasts. ... Mineralization which leads to finalized bone tissue takes place within a period of day to weeks. ...
Louis with information such as; maps of their route and the surrounding regions; specimens and descriptions of plant, animal, and mineral resources; and information about the native Indians of the west. ... There he obtained the knowledge on how to classify plants and animals and how to determine geographical positions by following the stars. ... Louis on the keelboat, with animal, plant and mineral specimens; maps; and reports for President Jefferson. ...
Acids In everyday life we deal with many compounds that chemists classify as acids. ... These acids are called mineral acids because they can be prepared from naturally occurring compounds called minerals. Mineral acids are generally stronger than household acids, and should be handled with great care because they can burn skin and clothing. ... How Acids are Prepared: Acids may be prepared when certain gases, related to acids, are dissolved in water and when certain salt compounds, again related to acids, are allowed to react with sulfuric acid. ... How does this happen? ...
Understanding the buyer behavior of organic food consumers and behavioral segmentation of potential buyers NAME: Institute: Jamnalal Bajaj Institute of Management Studies (JBIMS) Mumbai Specialization: Marketing Understanding the buyer behavior of organic food consumers and behavioral segmentation of potential buyers Executive summary 1.0 Definition of organic foods Organic foods are minimally processed to maintain the integrity of the foods without artificial ingredients, preservatives or irradiation 2.0 Analysis of buyer behavior Analysis of buyer beh...
In contrast to the mineral, plant and animal kingdoms, it is and will continue to be, a renewable resource. ... This involves consideration of supply (how much water is available) and demand. ... Water in Australia (Ingle Smith, 1998) attempts to solve questions such as Who uses what', where and how much?' ... The 1987 survey together with Ingle Smith's (1998) research, classifies water into four major categories. ... Many of the reasons for, and solutions to, Australian or world crises in water are dominated by the role of irrigation water and these figures demonstrate simp...
A person will begin not only to lose weight but to receive complements on how good they look. ... Some of the dangers include; electrolyte imbalance-which is when the body's fluid and mineral balance is upset-dehydration, damage to bowls, kidney, and liver, and in many cases heart attack or failure. ... At this point a majority of the doctors say that an obese person does have disordered eating, although they will not classify it as an official eating disorder. ...
When classifying organisms, scientists study a wide range of features, including those visible to the naked eye, those detectable only under a microscope, and those that can be determined only by chemical tests. ... Scientists use the fossil record to learn how certain animals have changed and evolved through Earth's history, which may provide clues for classification. ... They are among the leading decomposers of organic matter; breaking down plant and animal remains and wastes into their chemical states, as well as having a critical role in the recycling of minerals and carbo...
Introduction Plants used as medical treatments for is a practice that transcends since the beginning of time. Ancient civilizations, such as the first with written records, indicate their use of plants and herbs for their healing properties. Indian and African cultures are widely known for their us...
