1. 1-2: Introduction to Chemistry Define chemistry and matter. Compare and contrast mass and weight. Identify the common steps of scientific methods. Compare and contrast types of variables.

2. Chemistry & Matter Matter is everything in the universe. It fills space and makes up the things that we use everyday. A candle is made of matter. The wax (matter) and oxygen (matter) burn to produce carbon dioxide (matter) and water (matter). Matter is anything that takes up space. Mass is the measurement of how much matter is present.

3. Mass vs. Weight Mass and weight are not the same thing. Many use them interchangeably, but science does not. Weight is the measure of gravitational forces acting on mass.

4. Scientific Method 1.Observation Collect data that leads to a question. 2.Hypothesis Prediction about the outcome of an experiment that supplies a probable answers to the question. 3.Experiments A set of controlled activities or procedures. 4.Data analysis An evaluation of collected information. 5.Conclusion Did the hypothesis answer the question. 6.Retest or revaluate

6. Observations Use as many senses as is sensible! Avoid vague terms. A ‘bad’ estimation is better than a general term. Do not identify … describe. Do not “liken”… describe. Note the excessive use of DESCRIBE

7. Observations 1. The dessert is delicious. 2. The dessert is colorful. 3. The dessert is like a torte. 4. The dessert is tiny. 5. The dessert is chocolate moose cake. 1. The dessert is thick and creamy. 2. The dessert is several shades of light brown. 3. The dessert is round and flat. 4. The dessert is an 8 inch diameter. 5. The dessert is made of chocolate cream and fudge.

8. Unit 1-1 Summary What is chemistry? –The study of matter and any changes in matter. What is matter? –Anything that has mass and takes up space. What is weight? –It is the measure of the effect gravity has on mass. What are the five steps to the scientific method? –Observation, hypothesis, experiment, data analysis, and conclusion.