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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The Scientific Method: A logical series of steps scientists follow when solving problems. Orange Grove Experiment. Hypothesis: If we add fertilizer to the soil, then we will grow large oranges. Orange Grove. Purpose: Discover how to grow the biggest oranges. Example.
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Chemistry Jeopardy. A fun way to review Prefixes, Sig Figs and Conversions . Jeopardy. Final Jeopardy. The number of kilometers/hour in 356 meters/second. What is 1281.6 km/hr?. DAILY DOUBLE !. DAILY DOUBLE !. 234. What is three sig figs?. 1300. What is two sig figs?. 0.001340.
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Measurements & Calculations. Chapter 2. Section 2.1. Objective: show how very large or very small numbers can be expressed as the product of a number between 1 and 10 AND a power of 10. Scientific Notation. Scientific Numbers. In science, we often encounter very large and very
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Accuracy & Precision. Two important points in measurement. Accuracy and Precision At the conclusion of our time together, you should be able to:. Explain the difference between the accuracy and precision Give examples of accuracy and precision. Accuracy.
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Scientific Measurements. BIG NUMBERS. Scientists often work with very large numbers. National debt = $5,653,000,000,000 Bill Gates' net worth = $75,030,000,000 Distance to Alpha Centauri = 40,120,000,000,000,000 m Distance to Andromeda Galaxy = 21,800,000,000,000,000,000,000 g
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Presenting Numerical Values from an Investigation. Version 080104. Outline. Uncertainty Propagation of Uncertainty Least Squares Fit to Lines. Online References. www.av8n.com/physics/uncertainty.htm mathworld.wolfram.com/LeastSquaresFitting.html www.physics.csulb.edu/151lab/exp4/lsf.html.
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Units, Measurement, Significant Figures & Conversions. Physics. SI Units. The SI Units we will be concerned with mostly are: Quantity Unit Length/Distance Time Mass Temperature . meter [m] second [s] kilogram [kg] Kelvin [K]. SI Units.
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Significant Figures Density % Error. Significant Figures. The number of digits reported in a measurement. All the known digits plus one estimated value. The number of significant figures possible depends upon the piece of equipment used to take the measurement. Significant Figures.
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The Metric System. Seo Physics. What is the Metric System?. Aka. S.I. System (International Standards) A tool for measurement of different values Because it is a system, it is very consistent
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Scientific Measurement Ch. 3. Why are precise measurements and calculations essential to the study of chemistry?. (3.1) Measurements. Quantity that has a number and unit. Accuracy and Precision. How close a measurement comes to the actual value of what is being measured
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Significant Figures (Sig Figs). Quantity includes all known digits plus one estimated digit = last digit of # Indicates precision 500 vs 500.01. Rule 1: All digits recorded from a lab measurement are called significant figures. Rule 2: All non-zero digits are considered significant.
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Accuracy vs. Precision. Accuracy - how close a measurement is to the accepted value Precision - how close a series of measurements are to each other. ACCURATE = Correct PRECISE = Consistent. Courtesy Christy Johannesson www.nisd.net/communicationsarts/pages/chem. Significant Figures.
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