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Chapter 2.1: Scientific Method

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Chapter 2.1: Scientific Method

1. 1. Measurements and Calculations<br />Chapter 2<br />2 + 2 = 4<br />3 – 1 = 4<br />
2. 2. Objectives<br />Describe the purpose of scientific method<br />Distinguish between qualitative and quantitative observations<br />Describe the differences between hypotheses, theories, and models<br />
3. 3. Scientific Method<br />Logical approach to solving problems<br />Observing and collecting data<br />Formulating a hypothesis<br />Testing a hypothesis<br />Formulate a theory<br />
4. 4. Observing and collecting data<br />Observing – use senses to obtain information<br />Qualitative – descriptive ex: blue, large<br />Quantitative – numerical ex: 25 meters, 6 seconds<br /><ul><li>System – specific portion of matter in a given region of space that has been selected for study during an experiment</li></li></ul><li>Formulate hypothesis<br />Define: a testable statement<br />Forms and If – Then statement<br /><ul><li>Examples:
5. 5. Girls are smarter than boys
6. 6. 25% phosphorus fertilizer is best for plant growth
7. 7. Test hypothesis
8. 8. Controlled Experiment
9. 9. Keep all variable same except one</li></li></ul><li>Theorizing<br />Model – explanation of how phenomena occur and how data or events are related.<br />Lottery machine – gas behavior<br /><ul><li>Theory – broad generalization that explains a body of facts or phenomena
10. 10. Theory of relativity
11. 11. Big bang theory
12. 12. Theory of evolution</li></li></ul><li>Scientific Method<br />