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Transcript
Unit I: Introduction to Chemistry and Matter Tuesday August 29th, 2006 - Day 2: Questions of the day: What is Chemistry? What are two types of scientific observations and what are ways of representing them graphically? SWBAT: Discuss the importance of chemistry & the two basic types of observations by making such observations What is Chemistry? Webster’s Definition: 1 : a science that deals with the composition, structure, and properties of substances and with the transformations that they undergo 2 a : the composition and chemical properties of a substance <the chemistry of iron> b : chemical processes and phenomena (as of an organism) <blood chemistry> 3 a : a strong mutual attraction, attachment, or sympathy <they have a special chemistry> b : interaction between people working together; specifically : such interaction when harmonious or effective <a team lacking chemistry> My definition: Chemists explain what is visible by processes that are not visible to the human eye, but detectable by scientific means. So what? Is chemistry important? Chemistry is all around us. You can color, straighten and curl your hair because of chemistry. When you eat, chemistry is happening. You are happy or sad in part because of your brain chemistry. Chemistry is happening all the time. Mary had a little lamb/But now it is no more/For what she thought was H2O/Was H2SO4. Also, if you like somebody, but you have no chemistry together, that’s important! 2nd Homework Assignment, Due Friday September 1st: What would it feel like to have none of the chemistry knowledge that we have today? Imagine that you go back in time and you are a Neanderthal just figuring out stone tools. Oops, too far back! Let’s send you to a society that has figured out agriculture and where some people have the luxury of free time. You are one of those lucky few: 1. What are 3 questions that chemistry might be able to answer for you? 2. What are the first 5 things that you would do to start the entire discipline of chemistry? 3. What are 3 types of people in your society that you would talk to about this chemistry business? 4. How would you decide if you were right about your ideas/explanations? 5. What 3 steps would you take if somebody disagreed with your ideas/explanations? Your first homework assignment due Friday is to answer these questions from the point of view of such a person. You must pick a society to be from, for example the early Greek, Egyptian, Sumerian, Malian, Inca, etc… empire. Use Wikipedia to find out about these societies and use at least one specific detail in answering each question. Title page: Title, including the name of the society you are choosing Colored, hand-drawn map of the society you are choosing = 8 points Your name = 3 points Class = 2 points Period = 5 points Date = 5 points. Each question is worth 15 points. All questions should fit on at least 1 page, no more than 1.5. Grammar, spelling and punctuation mistakes cost 2 points each. Bonus 10 points if typed in a simple font and spaced 1 ½. Today’s lecture: Types of observations and how to write them down: Qualitative versus Quantitative Qualitative = An observation that states quality or kind Quantitative = An observation that states quantity or amount Qualitative Red Quantitative far from the earth microscopic burns quickly hot 700 nm wavelength 300 million light years smaller than 1 um burns at 1 cm candle per minute 350 degrees C Turn to a neighbor and ask them six questions. Write down 3 quantitative and 3 qualitative observations about that person. What you have is raw data, now how do we convert that to graphs and tables? Scientific process – observation, quantitative versus qualitative Scientific method Lab write–up Demos Tools of the trade QUIZ #1 Intro to chemistry – section 1.2 of the book Matter Mixtures Chemical & Physical change DDR lab for accuracy + precision ID areas of chemistry Current event Practicum QUIZ #2 Scientific Measurement (no calculators) Accuracy/precision Lab practical Scientific Notation Significant Figures Exponential Notation/Operations UNIT TEST 1 Lab safety Lab safety QUIZ Scientific measurements part 2 – conversions, sig figs Problem solving UNIT TEST 2 (scientific measurement only) Physical/Chemical change lab – distillation of soda to capture water Unit II: The Elements Unit Unit Unit Unit Unit Unit III: Compounds IV: Chemical Change V: Gases VI: Solutions VII: Carbon and Its Compounds VIII: Nuclear Chemistry