CELL STRUCTURE CELL THEORY: Structural and functional unit of all living things New cells arise from already existing cells Cells contain information that instructs growth. This information can be passed onto new cells. MICROSCOPES: There are two main types of microscopes: Light and Electron Electron Micrographs- shown in colour LIGHT ELECTRON Uses beam of light Magnification = x1500 Resolution = 200 nm Wide range of specimens can be used Samples are fairly quick + easy to prepare
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will not enter into discussions or correspondence in connection with these mark schemes. Cambridge is publishing the mark schemes for the May/June 2012 question papers for most IGCSE‚ GCE Advanced Level and Advanced Subsidiary Level syllabuses and some Ordinary Level syllabuses. Page 2 Mark Scheme: Teachers’ version IGCSE – May/June 2012 Syllabus 0580 Paper 31 Abbreviations cao correct answer only cso correct solution only dep dependent ft follow through after error isw ignore subsequent working
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Alchemy vs. chemistry Some people think that chemistry is just about mixing things up and experimenting in test tubes and explosions. Actually chemistry studies everything around us and how they change‚ for example it tells what your body is made out of. We study chemistry in biology‚ geology‚ engineering‚ and even physics. Chemistry is the science of matter‚ and how it changes and its chemical reactions‚ it’s also called as the central science ( the main one) because it connects physics with other
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The importance of chemistry‚ or any other area of study‚ depends entirely on how relevant it is to some desired outcome. If you wished to create a new type of plastic‚ chemistry would be highly important‚ but if you wished to develop a new music genre‚ chemistry would probably be of no importance at all. It is extremely important. That aspirin or tylenol you may take for a headache was made by chemists‚ as are antibiotics‚ and other prescription meds. Not only are chemists in the drug trade‚ but
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Food Chemistry Journal From raw food to brand label grocery. Why Food Chemistry? I am passionate about food‚ I love discovering new food‚ experimenting with taste‚ play with colors and learn the benefits and why our body needs certain nutrients. Before coming to college I did 2 years of full healthy dishes and read all over internet and books new ways to introduce new nutrients to my diet. During this 2 years I lost weight but except for that I felt clean from the inside‚ more energetic and happier
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We are in the age of science and technology. Man cannot live without the aid of science. Science has so much engulfed our lives that nothing can take place in our day to day work without the help of science. Our food‚ transport‚ learning‚ administration‚ recreation and social life are all linked with science in various ways. There are many advantages of scientific discoveries in our daily life .Nowadays there are gadgets to remove drudgery. Electricity‚ communications‚ transport‚ entertainment and
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Module 4: 10. Strong Bases: NaOH‚ KOH‚ Na2CO3‚ NaHCO3‚ Na3PO4‚ NaHPO4‚ Strong Acids: Fe(NO3)3‚ HCL‚ HNO3‚ Al(NO3)3‚ NiCl2‚ H2SO4 11. Acidic Neutral Basic NaCl KNO3 NaOH HC2H3O2 Na2CO3 NaC2H3O2 NaHCO3 Fe(NO3)3 NaNO3 Na3PO4 HCl MgSO4 KOH HNO3 Na2SO4 NaHPO4 CuSO4 NaNO2 CoCl2 Al(NO3)3 NiCl2 H2SO4 KCl NH4Cl 12. CuSO4 CuCO3.Cu(OH)2(s) + 2 H2SO4(aq) ----> 2 CuSO4(aq) + CO2(g) + 3 H2O(l) Na3PO4 Na3PO4 (aq) + 3H2O (l) --> H3PO4 (aq) + 3NaOH
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Experiment 9 : The effect of substrate concentration on enzyme activity Objective To find out the relationship between the substrate concentration and the rate of reaction by determining the number of bubbles produce Hydrogen peroxide (H2O2) is a by-product of biochemical metabolism. An accumulation of hydrogen peroxide can be deadly‚ so it has to be decomposed. One of the decomposing factors is an enzyme called Catalase. Catalase breaks hydrogen peroxide into water and oxygen. The chemical
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Properties of Different Bonds An ionic compound forms from a nonmetal and metal element. A covalent compound is formed by two non metal elements. A metallic compound is formed by two metal elements. Metallic compounds have generally high melting points‚ are loose and flexible with their electrons‚ conduct electricity well‚ and have low solubility in water. Ionic compounds are generally crystals‚ have a high melting point‚ and usually have high solubility in water and conduct electricity well when
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Decomposition Reaction-Electrolysis of Water Introduction: Demonstrate the decomposition of water in simple but very colorful and dramatic fashion on an overhead projector. Concepts: • Decomposition reaction • Oxidation–reduction • Electrolysis • pH Materials: Sodium Chloride/universal indicator solution‚ NaCl‚ 25 mL Overhead projector Pencil lead‚ 0.7 mm Battery lead with alligator clips Petri dish‚ disposable Battery‚ 9-Volt
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