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Measurements and Calculations Chapter 2

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Presentation on theme: "Measurements and Calculations Chapter 2"— Presentation transcript:

1 Measurements and Calculations Chapter 2
2.1 – The Scientific Method

2 Scientific Method Scientific Method – logical approach to solving problems by observing and collecting data, formulating hypotheses, testing hypotheses, and formulating theories that are supported by data

3 Scientific Method System – a specific portion of matter in a given region of space that has been selected for study during an experiment or observation Formulating Hypotheses Hypothesis – testable statement in the “if-then” format

4 Scientific Method Testing Hypotheses Using controls and variables
Not proven, just supported Theorizing Model – explains how phenomena occur & how data or events r related Theory – broad generalization to explain a body of facts or phonomena

5 The Problem Observed Problem: Alka Seltzer tablets do not dissolve quickly enough System to be studied: There are 2 tablets and 500 mL of water. Data collected: The tablets weigh 7.0 grams. At r.t. it takes 5 min to dissolve. Hypothesis – “If __________________, then the tablet will dissolve quicker.”

6 Solve It! Testing Hypothesis: Was your hypothesis supported? ____
What are your controls and variables? __________________________________ What are your procedures? ______________________________________ Was your hypothesis supported? ____ Theory – can you make a theory to explain your observed results? ________________________________


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