2. Introduction to Chemistry

3. What is Chemistry? The study of the composition of matter and the changes that matter undergoes The study of the composition of matter and the changes that matter undergoes

4. Matter Anything that has mass and occupies space (volume)

5. Five major branches of chemistry Organic Organic

6. Inorganic Inorganic

7. Analytical Analytical Physical Physical Biochemistry Biochemistry

8. Pure Chemistry – knowledge for knowledge sake Pure Chemistry – knowledge for knowledge sake Applied Chemistry – directed toward a practical application Applied Chemistry – directed toward a practical application

9. Book examples Nylon Aspirin

10. Why study Chemistry??? Explaining the natural world Explaining the natural world Prepare for a career Prepare for a career Be an informed citizen Be an informed citizen

11. Energy Chemistry plays a vital role in finding ways to conserve, produce, and store energy Chemistry plays a vital role in finding ways to conserve, produce, and store energy

12. Medicine and Biotechnology Medicines Medicines Surgical breakthroughs Surgical breakthroughs Genetic research Genetic research

13. Agriculture Protect crops Protect crops Increase food supply Increase food supply Increase strength and vitality of plants Increase strength and vitality of plants

14. Environment Pollution Pollution Catalytic converters Catalytic converters Acid rain Acid rain Ozone layer Ozone layer

15. SCIENTIFIC METHOD

16. 1. Observation Gather data: qualitative or quantitative

17. 2. Hypothesis t tentative explanation for what is observed (educated guess)

18. 3. Experiments – set of controlled observations that test a hypothesis

19. –Independent variable – one you are going to change

20. –Dependent – changes depending on the independent variable

21. –control – standard for comparison –Model – visual, verbal and/or mathematical explanation of experimental data

22. Conclusion – judgment based on the information obtained – judgment based on the information obtained

23. Theory – explanation that has been supported by MANY experiments – explanation that has been supported by MANY experiments

24. Scientific Law – describes a relationship in nature that is supported by many experiments. – describes a relationship in nature that is supported by many experiments.