1. Chapter 1: Chemistry & You

2. Criteria of Science Consistent Observable Natural Predictable Testable
Tentative

3. Is it Science? Non-science – movie ratings, food preferences
Pseudoscience – phrenology, homeopathy
Emerging science – nanochemistry

4. Chemistry
The study of chemistry investigates all substances and their changes
submicroscopic level

5. Chemistry Has roots in pseudoscience of Alchemy
Separated mixtures and purified chemicals
Lavoisier and Boyle helped change alchemy into a real science

6. The Scientific Method Begins
Curiosity
Observation, question, or problem
“Hmmmmmm” Let me think about that.

7. Hypothesis
Scientific Hypothesis: A testable statement about the natural world e.g. Bubbles will last longer in cold temperatures than in warm.
A hypothesis must be testable, and be able to be potentially proven right or wrong.

8. Scientific Method Cont.
Experimental Procedures – Steps to test our hypothesis.
Results and Analyze your results.
Conclusion - Revise your hypothesis and start over again.

9. Control & Variables Variable - what you are testing
Independent Variable – changed by the experimenter.
Dependant Variable –changes in response to the IV
Control - standard for comparison.

10. Scientific Method
After results are reproducable, scientific studies are published in journals.
Scientists review and critique published work.
Science is self correcting and tentative.

11. Scientific Theories and Laws
Theory – well tested explanation that unifies a broad range of observations and scientific results. (atomic theory, cell theory)
Strong predictive abilities (Plate tectonics).
Scientific Law: Concise statement that summarizes the results of many observations
e.g., Dalton’s Law, Law of Thermodynamics

12. The Scientific Method
The steps in the scientific method do not have to occur in the order shown. Comparing and Contrasting How are a hypothesis and a theory similar? How are they different?