Big city vs small town Essay Example for Free

Big city vs small town Essay Matter and Energy Learning Objectives Understand the general concepts of matter and energy-why are these entities important to environmental scientists? Be able to define and give examples of the three laws governing matter and energy-how do these laws affect our understanding of matter/energy quantity and quality Be able to differentiate between potential and kinetic energy Be able to discuss the concept of entropy and how this process affects all living things Check out the chemistry review if you feel you need some additional chemistry background for this section I. One important thing about systems and living things: Life obeys physical laws. Drink some water, eat some food, run to class. The two things that connect these activities and other aspects of life on earth are matter and energy. Matter has mass and occupies space: it is the stuff you and everything else is made of. Matter comes in a variety of forms. We call these different unique types of matter elements. An atom is the smallest unit of an element that has all of the properties of that element. There are 92 naturally occurring elements in nature. These different forms of matter differ uniquely in their physical and chemical properties: carbon (C) and hydrogen (H) differ in their size, reactiveness with other atoms, and other physical and chemical properties. An element is a substance that cannot be broken down to other substances by ordinary chemical means. An element can be combined with another to make a compound. For instance, hydrogen combines with oxygen to produce water. Scientists use symbols (hydrogen=H, oxygen=O) as a kind of short-hand for describing compounds. For example H2O is mean water is comprised of 2 toms of hydrogen and one atom of oxygen II. Energy is a more elusive concept. Formally, it is defined as the ability (or capacity) to do work Work is the product of force and distance. When you are walking up the Hill, you are doing work by applying muscles (force) to move up the Hill (distance). Energy is what you and all living things use to move matter around and to change matter from one form to another. Energy is used to grow your food, to keep you alive (metabolism), to move you from one place to another, and to warm and cool the buildings in which you work and  live. The uses and transformations of matter and energy are governed by certain scientific laws, which unlike the laws people enact, cannot be broken. III. There are three physical laws governing matter and energy that are important to us. A) Law of conservation of matter B) First law of energy (first law of thermodynamics) C) Second law of energy (second law of thermodynamics) A. Law of Conservation of Matter: (everything must go somewhere) We talk about consuming, or using up material resources, but actually we dont consume any matter. We only borrow some of the earths resources for a while C taking them from the earth, carrying them to another part of the globe, processing them, using them, and then discarding, reusing, or recycling them. In the process of using matter we may change it to another form, but in every case we neither create nor destroy any measurable amount of matter. This results from the law of conservation of matter: In any physical or chemical change, matter is neither created nor destroyed but merely changed from one form to another. When you throw away something, remember there is no away. Everything we think we have thrown away is still here with us in one form or another. How does this affect environmental science ? Although we can certainly make the environment cleaner, the law of conservation of matter says we will always be faced with pollution of some sort. This means that we musttrade-off one form of pollution for another. This trade-off involves making controversial scientific, political, economic, and ethical judgments about what is a dangerous pollution level, to what degree a pollutant must be controlled, and what amount of money we are willing to pay to reduce the amount of a pollutant to a harmless level. B. The First Law of Energy (First Law of thermodynamics): You cant get something for nothing You encounter energy in many forms: mechanical, chemical (food and fuel), electrical, nuclear, heat, and radiant (such as light). Scientists usually classify most forms of energy as either potential or kinetic energy. 1) Kinetic energy is the energy that matter has because of its motion and mass. A moving car, falling rock, and the flow of electrons or charged particles called electrical energy are all examples of kinetic energy. The amount of kinetic energy matter has depends on both its mass and its velocity (speed). Because of its  velocity a bullet fired from a gun can cause more damage that one thrown by hand; and a bowling ball dropped on your foot does more damage that a pool ball. 2) Potential energy: The energy stored by an object as a result of its position or the position of its parts is called potential energy. A rock held in your hand, a bowl of cereal, a stick of dynamite, and a tank of gas are all examples. The rock has stored (or potential) energy that can be released and converted into kinetic energy (in the form of mechanical energy and heat) if it is dropped. Doing work involves changing energy from one form to another. a. When you lift an object, chemical energy (a form of potential energy) stored in the chemicals obtained from your digested food is converted into the mechanical energy (kinetic) used to move your arm and the object upward and into heat given off by your body b. In an automobile engine, the che into electrical energy and heat (low grade form of kinetic energy. c. In an electric power plant, chemical energy from fossil fuels (potential) or nuclear energy from uranium nuclear fuel (potential) is converted into a combination of mechanical energy and heat. The mechanical energy is used to spin the turbine that converts the mechanical energy into electrical energy and more heat. When the electrical energy oscillates through the filament wires in an ordinary light bulb, it is converted into light and still more heat. Note that in all of these transformations, some energy is always lost as heat that flows into the surrounding en vironment. 3) Energy changes: What energy changes occur when you drop a rock? Because of its higher position, the rock in your hand has a higher potential energy than the same rock at rest on the ground. When you drop the rock and it hits and eventually rests on the ground, the rock now has a much lower potential energy. Has the amount of energy changed (i.e., the rock lost energy where did it go?) At first glance it seems so. But according to the first law of conservation of energy, in any ordinary physical or chemical process is neither created nor destroyed but merely change from one form to another. The energy lost by a system or collection of mater under study (in this instance, the rock) must equal the energy gained by the surroundings or environment (in this instance, air molecules pushed out of the way, and soil particles moved by the impact of the rock). This energy law holds for all systems, living and nonliving. Lets look at what really happens. As the rock drops, its potential energy is changed into kinetic energy C both its  own and that of the air through which it passes. The friction created when the rock is drops through the air causes air molecules in the air to move faster, so their average temperature rises. This means that some of the rocks original potential energy has been transferred to the air as heat. When the rock hits the ground more of its mechanical energy is transferred to particles of soil. The energy lost by the rock (system) is exactly equal to the energy gained by its surroundings. Scientists have never seen an instance where energy input does not equal energy output. C. Second Law of Energy (Second law of thermodynamics): You cant break even Energy quality: Because according to the first energy law energy can neither be created nor destroyed, you might think there will always be enough energy. Yet when you fill a cars tank with gasoline and drive around something is lost. If it isnt energy, what is it? The second law of energy, also known as the second law of thermodynamics provides the answer to this question. Energy varies in its quality or ability to do useful work. For useful work to occur energy must move or flow from a level of high-quality (more concentrated) energy to a level of lower-quality (less concentrated) energy. The chemical potential energy concentrated in a lump or coal or a tank of gasoline and the concentrated heat energy at a high temperature are forms of high-quality energy. Because the energy in gasoline or coal is concentrated, they have the ability to perform useful work in moving or changing matter . In contrast, less concentrated heat energy at a low temperature has little remaining ability to perform useful work. Over the years, after investigating millions of conversions of energy from one form to another, scientists have found that some of the energy is always degraded to a more dispersed and less useful form, usually as heat given off at a low temperature to the surroundings. In an internal combustion automobile engine, only about 20% of the high-quality chemical energy available in the gasoline is converted to mechanical energy used to propel the car; the remaining 80% is degraded to low-quality heat that is released into the environment. In addition, about 50% of the mechanical energy produced is also degraded to low-quality heat energy through friction, so that 90% of the energy in gasoline is wasted and not used to move the car. When electrical energy oscillates through the filament wires in an ordinary light bulb, it is converted into a mixture of about 5% useful radiant energy (light) and 95% low-quality heat. It is interesting to note that much of modern civilization is built around the internal combustion engine and the incandescent light that, respectively, waste 90 and 95% of their initial energy input. Some of this waste is due to the energy-quality tax automatically exacted as a result of the second energy law and some is due to technological designs that waste more energy that necessary. Most energy exchange processes occur like this (high quality energy to low quality) but there is one VERY IMPORTANT exception: the conversion of solar energy to chemical energy in food by plants and some bacteria.Photosynthesis converts radiant energy (light) from the sun into high-quality chemical energy (stored in the plant in the form of sugar molecules) and low-quality heat energy. If you eat plant food [like spinach], its high-quality chemical energy is transformed within your body to high-quality mechanical energy, used to move your muscles and to perform other life processes, and low-quality heat energy. The process of breaking down food such as sugars to simpler molecules, such as CO2 and water, releasing potential energy in the process, is called respiration. At each step, the low-quality heat flows into the environment. Without the action of plants and bacteria, life as we know it would not exist because animals have no way of turning the radiant energy from the sun into high energy (high quality) food. So, the first energy law governs the quantity of energy available from an energy conversion process, whereas the second energy law governs the quality of energy available. According to the first law we will never run out of energy, but according to the second law we can run out of high quality or useful energy. Not only can we not get something for nothing (the first law), we cant even break even in terms of energy quality (the second law) The second energy law also tells us that high-grade energy can never be used over again. We can recycle matter but we can never recycle high-quality energy. Fuels and foods can be used only once to perform useful work. Once a piece of coal or a tank full of gasoline is burned, its high-quality potential energy is lost forever. This means that the net useful, or high-quality energy available from fossil fuels, uranium, or any concentrated energy source is even less than predicted by the first energy law. d. mical energy stored in the gasoline is converted into mechanical energy that propels the car and is eventually lost as heat (engine heat), friction of the tires with the ground, and energy imparted to the air as it is pushed out of the way by your car.

Ephedrine with Caffine - The Secret to Weight Loss :: Health Diet Essays

Ephedrine with Caffine - The Secret to Weight Loss Ephedrine is an over the counter herbal stimulant stemmed from the Chinese plant ma huang. The Chinese discovered this stimulant over two thousand years ago for the purpose of treating asthma, cold and flu symptoms, chills, lack of perspiration, headache, and edema. Ephedrine is presently found in herbal stimulants, prescription cold and flu remedies, and asthmatic aid products. Because it is a stimulant, ephedrine motivates thermogenesis in the body. This effect results in speeding up the heart rate causing the metabolism to expedite. Due to this increased metabolism, ephedrine can also be used as a weight loss supplement http://www.vanderbilt.edu/AnS/psychology/health_psychology/ephedrine-final.htm Ephedrine contributes to weight loss with its thermogenetic effects by heating up the body, which in turn results in burning fat. It speeds up the metabolic rate and calorie consumption by opening the receptor sites in the heart and lungs. Consequently, fatty acids are released from the stored fat cells and the transition from fat to energy is greatly increased. Another beneficial effect is directed to the muscles increasing stamina and endurance for body builders (http://www.mahuang.com). One study in the American Journal of Clinical Nutrition of March in 1987 showed that a group of rats lost 75% of their body fat from ephedrine. Another study performed in the International Journal of Obesity Related Metabolic Disorders in February of 1993 made claims that "ephedrine increases the release of brain catecholomines to enhance thermogenesis, without significant cardiovascular effects" and concluded that "varying combinations of ephedrine and aspirin could provide a safe combination with the necessary thermogenetic properties to assist in the management of obesity" (http://www.smartbasic.com/glos.herbs/ephedra_wt.loss.html) Harmful side effects†¦ In addition to the reports about the positive aspects of ephedrine, harmful side affects have also been declared. It can alter emotions causing aggressiveness or anxiety that can lead an individual to a risk of personal injury. Other harmful side effects include an increased heart rate and blood pressure possibly leading to dehydration and decreased circulation. Long term more serious effects that these conditions can lead to include cerebral hemorrhage, strokes, or heart irregularities (http://www.vanderbilt.edu/AnS/psychology/health_psychology/ephedrine-final.htm). Some serious dangers such as death have been related to the use of ephedrine. For this reason, regulatory action on this herb is being considered. The herb has been discovered to be the beginning ingredient in methamphetamine laboratories for the product of the illegal stimulant drug (http://www.smartbasic.com/glos.herbs/ephedra.html. Other abuses of this herb have also been reported causing death.

Culture similarities and differences in early East Asian history Essay

Culture refers to people’s way of life. Culture is transmitted from one generation to another. Culture is leaned. Culture is a means through which society share values, beliefs, customs, behavior and artifacts. Tradition refers to the process of doing an action more than once. For example, repeating an action now and again makes it be a tradition. Going home to celebrate festivals together as a family could become a tradition if every festive you go home. Culture in the Asian countries rotates around art, beauty, medicine and cuisines. Chinese culture In the Chinese society, there are five necessities that define their culture. These necessities are: Food, clothing, housing, transportation and education. Chinese cooking is of two types. That is, Northern and Southern cooking styles. Northern dishes have a lot of oil and garlic and vinegar are usually pronounced. Pasta is valued in the Northern style of cooking. In the Southern cooking styles, chili peppers are valued. Rice and rice products are usually used as accompaniments. In Chinese cooking, color, smell and taste are given same value in meal preparation. Most of the time, a meal will include three to five colors. Most valued during cooking is the preservation of the fresh natural taste of the spices. The three properties of color, aroma and taste are not only the issues valued in Chinese cooking, but nutrition is of great importance. According to Shang dynasty(Chinese culture 16th to 11th B. C ) Yi Yin, he related the five tastes of sweet, sour, bitter, piquant and salty to the nutritional needs of the five major system organs of the body( the heart, liver, spleen, lungs and kidneys) and emphasized their function in maintaining good physical health. Most of the vegetables used in Chinese cooking such as garlic, dried lily buds, tree fungus have components that help in preventing and alleviating diseases. Chinese culture believes that food and medicine share the same origin. Chinese culture has got certain restrictions associated with eating. That is, meals taken while seated, sitting arrangement is based on age and gender. The dishes are arranged per table basis with a table capturing around ten to twelve people. Chinese dressing symbolizes a meaning of its own. The main types of Chinese traditional dressing are: pien-fu, long robe and shen-i. The pien-fu is a ceremonial costume in which one had to wear a tunic like top that extends to the knees and a skirt that touches to the ankles. A pien is a cylindrical cap. Similarities between these clothing are wide cut and voluminous sleeves with straight lines. They are also made more attracting by adding ornaments onto them such as doing embroidery along the edges, decorated bands, draped cloths and silk. In the traditional Chinese clothing, dull colors were favored to light colors. Bright colored clothes were used by common people around the houses. Chinese culture associated certain colors with specific times such as green symbolizes spring, white representing autumn, black for winter and red for summer. Traditional Chinese housing is characterized by a rectangular- shaped unit space that is joined into a house. The Chinese structures combine rectangular patterns of different sizes and positioned in order of preference, with every stage clearly distinguished. In the traditional buildings, the principle of balance and symmetry is taken into consideration. The main building is the axis with the other buildings being joined to the sides to form wings on both sides serving as the main room and yards. All other Chinese structure such the church, residential houses, palaces and official structures follow the same design. The interior space is allocated in away that it defines the Chinese social setting and ethics. For instance the main room is for the master, elder members of the master occupy the backyard of the main room while the junior members live in the right and left wings with the most senior occupying the left wing and the others right wing. Certain pronounced features of Chinese structures are its wooden structural frame with pillars and a beam, and mud made walls surrounding the three faces. The main doors and windows are constructed on the front face of the building. Woods is used in Chinese structures because they believe that wood represents life which is the essence of their culture. Chinese people build houses that have deep and over hanging roofs. Because of this, they came up with their own way of giving the roofs support. This invention is called ‘tou-kung’, which goes up stage by stage from pillar to pillar. The tou-kung gives support to the structure and at the same time acts as a unique and attractive ornamentation. The significance of using wood in the Chinese construction is that the size of the rooms depends on the wooden frame used. Again, color is applied to prevent the wood and third is the skill of building a structure on a platform to prevent moisture. The use of various colors in Chinese buildings has both symbolic and aesthetic meaning. In the transport system, china did not have any kind of wheeled vehicles until importation of the chariot was done from central Asia in the period of 1200bc. Scholars also ague that early Bronze Age china did not own the skills of the chariot and never invented any other means of transportation such as wheelbarrows or carts. For example, Edward Shaughessy found out that during the Shang periods, â€Å"there is absolutely no artifactual evidence for other types of wheeled conveyance†. In the 19th and 20th centuries, rickshaws became most popular but were later overtaken by cycle rickshaws and auto rickshaws. Bicycles today are so many in china that, they cause traffic jams. Today china use both railways and waterways as modes of transportation. Education system in china is socialist oriented with a classroom having a capacity of about 50 students. Learning is always through group work to promote team spirit and cooperation among the students. Chinese value education because they believe it is a stepping stone to success. In china excellence is the main purpose for education. This is because they aim at producing responsible citizens who can give quality service to society. That is, a student excels to benefit the country but not him or her. Japanese culture Japanese culture is largely borrowed from china but Japanese culture is mainly influenced by its language. Japanese language is a combination of subset languages that are borrowed from china. That is, hiragana, katakana and kanji. Japanese usually have different types of traditional foods for various seasons such as osechi-ryori foods for New Year, kabochi on winters, weeding foods and mother dinners. Japanese also use spices in food preparation so as to make it tasty and give an appetizing smell. Japanese have got eating manners that they expect people to adhere to when eating. These tips on how to eat varies from one meal to another. Their dishes include sushi, tempura and teriyaki. Japanese performing art is characterized by costumes, mask and stylish gestures. Their four theatres are noh, kabuki and bunraku. Japanese way of building is also an important aspect of their culture. It was heavily influenced by the Chinese architecture and examples of these are seen in the temples, shrines and castles. In terms of clothing, Japanese wear kimono. Kimono implies â€Å"something to wear. † Initially Japanese used the word kimono to refer to all types of dressing but today it only implies long dress that is worn by men, women and children. Kimono is available in different colors with men prioritizing dark colors and women prioritizing brighter colors. The summer kimono is light and it’s called yukata. In the world of sports, methods that were used to train warriors in the past have been organized into sports. For example, kenjutsu, kyudo, and sumo. Again, Japanese popular culture presents a link to the past. Favorite films, television programs and music are all established from the traditions. Japanese also have got aculture of making sculptures. The oldest sculpture made is known as Amitabha in the Zenko-ji temple and it is made of wood. Japanese value wood and it has been used in Japan as one of the main materials by architectures. Other materials that have also been used are stone and pottery. They also have a flower arrangement art known as Ikebana which emphasizes on harmony, rhythm and color use. Comparison between the two cultures However there are certain variations in the two cultures. That is, in Japan buildings are structured around grand palaces while in china, they are based on the concept of walled cities. In terms of food, their primary dish is rice even though the mode of preparation is different. In their concept of beauty, Japanese considers beauty as a concept that is temporary to life. They use a symbol known as sakura (cherry blossom) to express the fleeting property and wilting nature of beauty. But in china, beauty is part of nature and this explains the common paintings of lions, cats and tigers. Musically, Japanese love more vocal music that takes its routes from dramatic styles such as Noh, Kabukl, and Bunraku while Chinese traditional music is dominated by instruments such as the flute and oboe. Traditionally the two societies do not like each other. Japanese have a collective kind of culture than Chinese. Both Chinese and Japanese up hold respect for tradition, family and beauty but Japanese tend to be consistent with the practice. Taking the above discussion into consideration, I wish to conclude that the two cultures are different even though Japanese culture was influenced mainly by Chinese culture, References Chinese culture and tradition. The five necessities of Chinese culture. Retrieved. December 15, 2008. from, http://www. chinatownconnection. com/chinese_culture. htm eHOW, How to distinguish between Japanese and Chinese culture. Retrieved December 15, 2008. from, http://www. ehow. com/how_2081085_distinguish-between-japanese-chinese-cultures. html

Instructional Objective ( Lesson Objective ) Essay

Instructional Objective (Lesson Objective) After analyzing and annotating documents based on social class in Ancient Egypt, students in groups, will determine the central ideas or information of a secondary source by creating a fact sheet. The students will then make an exit slip of a quote (the students can create a hashtag to tweet with) based upon on their assigned social class, the students must have no less than three historical facts. CCLS/ +NYS Standards and Indicators CCSS.ELA-LITERACY.RH.6-8.2 Determine the central ideas or information of a primary or secondary source; provide an accurate summary of the source distinct from prior knowledge or opinions. Indicator: This will be evident when the students create the fact sheets using their documents. NYS. K-8. SOCIAL STUDIES FRAMEWORK.6.3d Political and social hierarchies influenced the access that groups and individuals had to power, wealth, and jobs. 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