Copy of Measurement-PD - Measurement Dr Dutta What is...

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Measurement Dr. Dutta
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What is Chemistry? Chemistry : The study of the composition of matter and the changes that matter undergoes. Many everyday applications Clothing Pots and Pans Cosmetics Etc.
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Branches of Chemistry Organic Chemistry : Study of essentially all substances containing carbon. Inorganic Chemistry : Studies primarily substances that do not contain carbon. Nonliving things. This class is mostly inorganic chemistry. Analytical Chemistry : Studies the composition of substances. Finding minute quantities of a medication in blood
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Branches of Chemistry, cont. Physical Chemistry : Concerned with the theories and experiments that describe the behavior of chemicals. The stretching of nylon can be explained by using the concepts of physical chemistry. Biochemistry : Studies living organisms. For example: digestion, blood clotting, respiration, and photosynthesis All of these branches overlap to a degree – you cannot study organic and biochemistry without using analytical.
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Where do we find Chemistry? Manufacturing materials Providing Energy Not just for our homes, but also for plants and animals. Medicine and Biotechnology Agriculture The Environment
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Tools for Measurement Clocks and stopwatches measure time. A balance is used to measure mass. A graduated cylinder, dropper, or volumetric flask is used to measure volume.
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Description ( Qualitative ) vs. Number ( Quantitative ) Number vs. Quantity Quantity - number + unit UNITS MATTER!!
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SI Units Quantity Base Unit Symbol Length Mass Time Temp meter kilogram second kelvin m kg s K Amount mole mol
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Data Collection and Sample Size The larger the amount of data collected, The larger the sample size, The more times the experiment is repeated, The more valid are the results.
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Analysis of the Data Data tables, flow charts and graphs present the information collected during an experiment. What the data shows, any trend in information is explained in the analysis of data.
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Data Presentation and Analysis Data tables are lists of information that may or may not show a relationship. Graphs are pictorial representations of information to aid in seeing any relation between them.
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Data Tables The first column is usually the independent variable, or what was being changed. Other columns are counts or measurements that were taken at each change.
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Reading Graphs Always read the title. Read the x- & y-axis labels & UNITS.
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