Summary of Week 1 A look back at the week‚ in which Dr David Robinson‚ Senior Lecturer in Biological Science at The Open University‚ discusses what you have learned so far in this course and then introduces some of the ideas and examples explored in week 2. There are different ways that an ecosystem can be defined and you discussed this with other learners‚ to reach a working definition of an ecosystem. You examined the core concept of an ecosystem through the example of a rock pool. Guidance
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ALLOCATION OF UNIFORM MARKS IN GCSE (APPLICABLE FROM JUNE 2010) What is a UMS? The Uniform Mark Scale (UMS) is used in unitised specifications as a device for reporting‚ recording and aggregating candidates’ unit test performances. Why do we need the UMS? In a unitised specification candidates may take units at different stages during the course and may retake units before certification. Each exam paper is unique‚ and so the difficulty of exams may vary slightly from year to year. Senior
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AT&T was started over 130 years ago in 1875. It started out when Alexander Graham Bell began work on the telephone. Initially it just made telephones and licensed to companies to Many changes in the company structure 6‚000 patents 7 Nobel prizes Analysis I. General Environment A. Technology Alexander Graham Bell invented the telephone and earned the patent in 1875. AT & T was incorporated in 1885 with objective of building and operating long distance network. AT & T was the
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strategies. Also‚ concentrating growth in the forecasted wireless and data services is a requirement for the strategy. AT&T will use its brand name‚ global reach‚ innovative power and leadership to continue to maintain competitive position. Company Background AT&T Inc. is a premier communications holding company in the United States and worldwide. Operating globally under the AT&T brand‚ AT&T is recognized as the leading worldwide provider of IP-based communications services to businesses and the leading
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Modeling Effective Dose: Salt Tasting lab Purpose The purpose of this lab is to see at what measurements (of salt) can the salt be detected by taste. Abstract The science of toxicology is based on the principle that there is a relationship between a toxic reaction (the response) and the amount of poison received (the dose). An important assumption in this relationship is that there is almost always a dose below which no response occurs or can be measured. A second assumption is that once a maximum
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Julie Nguyen Equilibrium Lab 4-28-14 I. Purpose To study the affect of temperature & concentration changes on systems in equilibrium II. Safety Wear apron Wear goggles Do not spill chemicals Clean up after use Wash hands Chemicals are TOXIC (by Britney Spears) III. Procedure A. Iron-thiocyanate equilibrium Pipet .3mL of 1 M iron (III) nitrate and .3 mL of 1 M ammonium thiocyanate. into clean 250 mL beaker. Add 75 mL of DS water. Mix well. Divide the solution into equal
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May 30‚ 12 Date Submitted: June 6‚ 2012 Name: 2968 Instructor: Reid A hydrate was given to our group and the identity of the hydrate was unknown. The lab workers were told to determine the identity of the unknown hydrate. The identity of the hydrate could be determined by calculating the hydrate’s percent of water. So the lab workers set out to determine the water percent of the unknown hydrate. The percent of any compound or element can be found by using a certain formula. This formula
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Chemistry Lab Report Water Hydration Introduction: A hydrated crystal or hydrated occurs when water becomes tightly attracted to a metal salt base on it’s polarity. The water molecules maintain integrity as molecules‚ however they are considered to be part of the formula of the hydrate. When the hydrate metal salt crystal is heated‚ the attractions to the water are broken by the heat energy and the water escape from the crystal. After heating the salt crystal is called as anhydrous‚ which
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Chem 201 Lab October 21‚ 2011 Lab #6: Preparation of 2-chloro-2-methylbutane – an Sn 1 Reaction Purpose The purpose of this experiment was to prepare an alkyl halide‚ 2-chloro-2-methylbutane by reacting 2-methyl -2-butanol (t-amyl alcohol) with hydrochloric acid. Alkyl halides are of wide interest because they are widespread and have diverse beneficial and detrimental impacts .The overall reaction is given below: Procedure 1 ml of 2-methyl-2-butanol was measured using 1 ml syringe and
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Back Laboratory Program SAFETY IN THE CHEMISTRY LABORATORY 786 Pre-Lab Extraction and Filtration 790 1-1 Mixture Separation 792 1-2 Water Purification 794 3-1 Conservation of Mass 798 4-1 Flame Tests 801 Pre-Lab Gravimetric Analysis 828 13-1 Separation of Pen Inks by Paper Chromatography 830 13-2 Colorimetry and Molarity 834 14-1 Testing Water 838 804 7-1 Separation of Salts by Fractional Crystallization 806 7-2 Naming Ionic
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