What is Chemistry Chemistry Is the study of
- Slides: 15
What is Chemistry
Chemistry �Is the study of matter and the change it goes through �Deals with the interactions of electrons between atoms
Matter �Matter-anything that has mass and takes up space �Mass- is a measure that reflects the amount of matter �mass does not equal weight �Weight incorporates the earth’s gravitational
Weight in Labs �Chemistry always records the mass of an object not its weight �A scale is used to measure weight �A balance is used to measure mass
Types of chemistry Type Definition Example Organic Carbon containing molecules Plastics, polymers Inorganic ** Non carbon containing molecules Metals, minerals, acid and base Physical ** Changes of matter and the energy change Thermodynamics Analytical Composition Laboratory chemistry Biochemistry Processed of living organisms Metabolism, pharmaceutical research
Scientific Method
What is the scientific method � 1 st it is a process used to organize data and research � 2 nd it provides a method to verify results of other scientists
Observation �Gather information based on qualitative data �Qualitative data describes the appearance and physical characteristics �Quantitative data describes numerical measurements that are taken during experiments
Hypothesis �Is an explanation for what was observed �A hypothesis is an explanation of a phenomena that has yet to be tested or proved �If…. Then….
If…. Then… �If I do my work, then I will pass Chemistry. �If I don’t do my work, then I will not pass Chemistry.
Materials �A list of all required material for the experiment.
Experiment � Experiment is a set of controlled observations and laboratory tests used to support or disprove the hypothesis � Variables for experiments are tested one at a time � Dependent variable is what is being measured, it is controlled by the independent variable � Independent variable is the variable that you are changing (such as temperature) � Control is the standard of comparison
Analyze data �Once experiments have been conducted the data and results from them must be analyzed systematically. �Data can take hours to years to properly look at
Conclusion � A judgment based on the data collected from the experiments � A hypothesis is not proven but supported or disproved �Models of the results are then created � Models can be tested and modified �If a model is good than researchers publish their results so others can validate them
The End Are there any questions?