'2 sig figs' presentation slideshows

Measurement

Measurement. Scientific measurement. Number vs. Quantity. Quantity - number + unit. UNITS MATTER!!. Courtesy Christy Johannesson www.nisd.net/communicationsarts/pages/chem. Types of measurement. Quantitative - use numbers to describe Qualitative - use description without numbers 4 feet

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Unit 0: Observation, Measurement and Calculations

Unit 0: Observation, Measurement and Calculations. Cartoon courtesy of NearingZero.net. Steps in the Scientific Method. 1. Observations - quantitative - qualitative 2. Formulating hypotheses - possible explanation for the observation 3. Performing experiments

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Unit 2: Significant Figures, Scientific Notation and Dimensional Analysis

Unit 2: Significant Figures, Scientific Notation and Dimensional Analysis. Cartoon courtesy of NearingZero.net. Nature of Measurement. Measurement - quantitative (based on numbers) -made up of 2 parts. - number - unit You must ALWAYS include the unit!!!

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NOTES: 3.1, part 2 - Significant Figures

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Please Put Away

Please Put Away. Electronic Devices. In the Classroom. Unit 3-4: Observation, Measurement and Calculations. Cartoon courtesy of NearingZero.net. Scientific Notation. In science, we deal with some very LARGE numbers:. 1 mole = 602000000000000000000000.

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Measurements and Calculations

Measurements and Calculations. Rules for Counting Significant Figures - Details. Nonzero integers always count as significant figures. 3456 has 4 sig figs. Rules for Counting Significant Figures - Details. Zeros - Leading zeros do not count as significant figures . 0.0486 has

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Measurement and Significant Figures

Measurement and Significant Figures. www.lab-initio.com. Steps in the Scientific Method. 1. Pose problem; Make Observations - quantitative (numerical) Ex: length, height, mass. Benefits: non-biased - qualitative (descriptive) Ex: color, smell, taste. Drawback: biased (opinion)

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Trash- ket -ba ll Get ready to show some skill!

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CH. 2 - MEASUREMENT

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Measurement and Significant Figures

Measurement and Significant Figures. www.lab-initio.com. Steps in the Scientific Method. 1. Observations - quantitative - qualitative 2. Formulating hypotheses - possible explanation for the observation 3. Performing experiments - gathering new information to decide

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Chapter 3

Chapter 3. Scientific Measurement. Qualitative Gives results in a description, nonumerical form. Quantitative Give results in a definite form, usually numbers and units. Measurements. Accuracy vs. Precision. Accuracy - how close a measurement is to the accepted value

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Significant Figures

Significant Figures. 6. 7. 5. Significant Figures. Significant Figures refers to two things: 1) How many digits you should record when taking a measurement 2) How many digits should appear in your answer after you perform a calculation. 1. Taking Measurements.

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Significant Figures

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Conclusion! you were right ( or wrong)

Science method. organized way of solving problems the steps are...( not always in this order). problem- /observation. experiment - you may have to try this over and over). collect information- reading, data collection, research. Conclusion! you were right ( or wrong).

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To the nearest 10

70. 67. To the nearest 10. 60. 70. 120. 123. To the nearest 10. 120. 130. 1000. 1090. To the nearest 1000. 1000. 2000. 5. 4.7. To the nearest whole number. 4. 5. 1. 1.03. To the nearest whole number. 1. 2. 4. 3.6. To the nearest whole number. 3. 4. 1.2. 1.24.

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Unit 2: Basic Math for Chemistry Lesson 1: Significant Figures

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Calibration vs. Precision

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Significant Figures

Significant Figures. There are two kinds of numbers in the world: Exact There are exactly 12 eggs in a dozen Most people have exactly 10 fingers and 10 toes Inexact Any measurement. If I quickly measure the width of a piece of notebook paper, I might get 220 mm 2 significant figures

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Significant Figures

Significant Figures. Cartoon courtesy of Lab-initio.com. Adapted from http://www.sciencegeek.net/Chemistry/Powerpoints2.shtml. Rules for Counting Significant Figures - Details. Zeros - Leading zeros do not count as significant figures . 0.0486 has 3 significant figures.

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Significant Figures -

Significant Figures -. = represent the valid digits of a number and tells us how good your instrument is. A. Rules for Significant Figures :. Rule #1 : Numbers other than zero are always significant. 2 sig figs. 96 g. 3 sig figs. 61.4g. 0.52 g. 2 sig figs.

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