Chap 1 - Chapter 1: Intro to Chemistry Scientific method:...

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Chapter 1: Intro to Chemistry Scientific method: Observe, Predict, Test Observations Qualitative: not scientifically measured. Observed using natural senses (the sky is blue, my hair is greasy) Quantitative: scientifically measured. Observed with instruments (You have gained 15 pounds) Predictions- becomes hypothesis, then after tested, becomes a theory
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Theories NOT an observation of what actually happens Theories are also called models. They serve to REPRESENT what actually happens While this will not be tested, this will help you understand what the fuck you’re doing. Example: you will soon learn about an electron’s “spin”. They don’t actually spin, but if you pretend that they do, it gives you a physical sense as to how they actually behave.
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Units of measurement Basis for qualitative observations Examples: length, mass, volume There are two major systems of units English (foot, pound-mass, gallon) Metric (meter, kilogram, liter)
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When dealing with small things, measuring in meters is inconvenient. Therefore, we have prefixes that multiplies the number by powers of 10. Your textbook has all the prefixes.
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Chap 1 - Chapter 1: Intro to Chemistry Scientific method:...

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