1. Chemistry Chemistry

2. What is Chemistry Chemistry: The physical science that deals with matter’s - Composition -Properties - Changes Matter: anything that has mass = everything

3. What does it include? The study of: 1)Chemicals 2)Chemical reactions 3)Chemical technologies 4)Chemical toxicity (effects of chemicals on the environment)

4. Changes of matter Chemical changes: AKA chemical reaction. When a new substance with new properties if formed VERSUS Physical changes: When no new substances are formed. eg. Boiling, Melting, Freezing

5. Branches of Chemistry

11. Classifying Knowledge in Chemistry Observation: -Direct form of knowledge that comes from one of the five senses (something you saw, smelled, taste, heard or felt) Types of Observations

12. Classifying Knowledge Qualitative Observations: Describes the qualities or changes of matter eg. The color, odor, or physical state (solid liquid gas) Quantitative Observation:

13. Classifying Knowledge Qualitative Observations: Describes the qualities or changes of matter eg. The color, odor, or physical state (solid liquid gas) Quantitative Observation: The degree of change in matter. It is a measurable value. eg. mass, weight, and force

14. Observations and Interpretations Interpretation: An indirect form of knowledge. Something you do not witness yourself (hence indirect). eg. Something you pick out of a text book

15. Picking out Observed and Interpretative Information 1)Observation: Magnesium metal burns when held in a bunsen burner. 2)Using interpretation to explain observation:

16. Picking out Observed and Interpretative Information 1)Observation: Magnesium metal burns when held in a bunsen burner. 2)Using interpretation to explain observation: Oxygen molecules collide with the magnesium metal. Magnesium loses 2 electrons which are then picked up by oxygen. This creates oxygen and magnesium ions

17. Types of Knowledge Empirical: Observed eg. Aluminum foil turns red in color of copper chloride Theoretical:

18. Types of Knowledge Empirical: Observed eg. Aluminum foil turns red in color of copper chloride Theoretical: Explains or describes the observation using theoretical knowledge eg. Copper ions gain electrons to form copper metal. Aluminum metals lose electrons and form aluminum ions.