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Measurements and Calculations Chapter 2 2 + 2 = 4 3 – 1 = 4
Objectives Describe the purpose of scientific method Distinguish between qualitative and quantitative observations Describe the differences between hypotheses, theories, and models
Scientific Method Logical approach to solving problems Observing and collecting data Formulating a hypothesis Testing a hypothesis Formulate a theory
Observing and collecting data Observing – use senses to obtain information Qualitative – descriptive      ex: blue, large Quantitative – numerical     ex: 25 meters, 6 seconds ,[object Object],[object Object]
Girls are smarter than boys
25% phosphorus fertilizer is best for plant growth
Test hypothesis

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Chapter 2.1: Scientific Method