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Ch2studentnotes-2 - Ch 2 Measurements and Calculations I...

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Ch. 2 “Measurements and Calculations” I. Scientific Method – a logical approach to solving problems by 1) observing and collecting data, 2) Formulating hypothesis, 3) testing the hypothesis and 4) formulating theories that are supported by data. A. Observing and Collecting Data (Observing) – Collecting data from observations (use your senses to make observations) 1. quantitative – (Quantity- how much)- data is numerical. Ex. Object, has many small pieces 2. qualitative - (quality- what kind?)- data that is descriptive (non numerical) Ex. Shiny, grey, solid, hard, bumpy 3. system – A specific portion of matter in a given region of space that has been selected for study during an experiment or observations. Ex. An unknown element in a closed container B. Formulating Hypotheses- Organizing and analyzing data, classifying, inferring, predicting and communicating. 1. hypothesis – a testable statement. (based on observations) Ex. If unknown #2 is a silver color, has an irregular shape, and is a shiny solid then it is_____. (Plutonium, aluminum, silver, lead, graphite(carbon) 1

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Ch. 2 “Measurements and Calculations”
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• Fall '16
• 9.8 m/s, 9.5 grams, D. Scientific Notation

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