1-2 Introduction to Chemistry

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  • Burning Candle Demo.
  • Salt dissolving in water.
  • 1-2 Introduction to Chemistry

    1. 1. Warm Up <ul><li>Describe each of the following items. </li></ul><ul><li>Do not name the items or describe is function. </li></ul>
    2. 2. 1-2: Introduction to Chemistry <ul><li>Define chemistry and matter. </li></ul><ul><li>Compare and contrast mass and weight. </li></ul><ul><li>Identify the common steps of scientific methods. </li></ul><ul><li>Compare and contrast types of variables. </li></ul>
    3. 3. Chemistry & Matter <ul><li>Matter is everything in the universe. </li></ul><ul><li>It fills space and makes up the things that we use everyday. </li></ul><ul><li>A candle is made of matter. </li></ul><ul><li>The wax (matter) and oxygen (matter) burn to produce carbon dioxide (matter) and water (matter). </li></ul><ul><li>Matter is anything that takes up space. </li></ul><ul><li>Mass is the measurement of how much matter is present. </li></ul>
    4. 4. Mass vs. Weight <ul><li>Mass and weight are not the same thing. </li></ul><ul><li>Many use them interchangeably, but science does not. </li></ul><ul><li>Weight is the measure of gravitational forces acting on mass. </li></ul>
    5. 5. Scientific Method <ul><li>Observation </li></ul><ul><ul><li>Collect data that leads to a question. </li></ul></ul><ul><li>Hypothesis </li></ul><ul><ul><li>Prediction about the outcome of an experiment that supplies a probable answers to the question. </li></ul></ul><ul><li>Experiments </li></ul><ul><ul><li>A set of controlled activities or procedures. </li></ul></ul><ul><li>Data analysis </li></ul><ul><ul><li>An evaluation of collected information. </li></ul></ul><ul><li>Conclusion </li></ul><ul><ul><li>Did the hypothesis answer the question. </li></ul></ul><ul><li>Retest or revaluate </li></ul>
    6. 7. Observations <ul><li>Use as many senses as is sensible! </li></ul><ul><li>Avoid vague terms. A ‘bad’ estimation is better than a general term. </li></ul><ul><li>Do not identify … describe. </li></ul><ul><li>Do not “liken” … describe. </li></ul><ul><li>Note the excessive use of DESCRIBE </li></ul>
    7. 8. Observations <ul><li>1. The dessert is delicious. </li></ul><ul><li>2. The dessert is colorful. </li></ul><ul><li>3. The dessert is like a torte. </li></ul><ul><li>4. The dessert is tiny. </li></ul><ul><li>5. The dessert is chocolate moose cake. </li></ul><ul><li>1. The dessert is thick and creamy. </li></ul><ul><li>2. The dessert is several shades of light brown. </li></ul><ul><li>3. The dessert is round and flat. </li></ul><ul><li>4. The dessert is an 8 inch diameter. </li></ul><ul><li>5. The dessert is made of chocolate cream and fudge. </li></ul>
    8. 9. Unit 1-1 Summary <ul><li>What is chemistry? </li></ul><ul><ul><li>The study of matter and any changes in matter. </li></ul></ul><ul><li>What is matter? </li></ul><ul><ul><li>Anything that has mass and takes up space. </li></ul></ul><ul><li>What is weight? </li></ul><ul><ul><li>It is the measure of the effect gravity has on mass. </li></ul></ul><ul><li>What are the five steps to the scientific method? </li></ul><ul><ul><li>Observation, hypothesis, experiment, data analysis, and conclusion. </li></ul></ul>

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