Splash Screen Example 9-5b Objective Analyze measurement.

Slides:



Advertisements
Similar presentations
The volume we read from the beaker has a reading error of +/- 1 mL.
Advertisements

Chem-To-Go Lesson 2 Unit 1 SIGNIFICANT FIGURES. 1)Determine the units used on the ruler. 2)Look closely to determine the smallest marking on the ruler.
Errors in Measurements Class measurements for the density of gold (in g/mL) Group 117.8Group Group 218.0Group Group 317.9Group
Ms. Albarico. Students are expected to determine the accuracy and precision of a measurement. demonstrate an understanding of concerns and issues that.
Chapter 1: Measurements
Physics Rules for using Significant Figures. Rules for Averaging Trials Determine the average of the trials using a calculator Determine the uncertainty.
Ch. 3.1 – Measurements and Their Uncertainty
Significant Figures Integrated Science Dr. May Significant Figures Numbers obtained from measurements are never exact values Numbers obtained from measurements.
Observations Qualitative Quantitative (measurements) Two parts needed
Calculations with Significant Figures
Significant Figures.  All measurements are inaccurate  Precision of measuring device  Human error  Faulty technique.
Welcome to Interactive Chalkboard Mathematics: Applications and Concepts, Course 3 Interactive Chalkboard Copyright © by The McGraw-Hill Companies, Inc.
Lesson 1 Contents Example 1Identify Prisms and Pyramids Example 2Identify Diagonals and Skew Lines Example 3Analyze Real-World Drawings.
Significant Figures.
Transparency 3 Click the mouse button or press the Space Bar to display the answers.
UNIT ONE TOPIC: Significant Figures and Calculations.
Significant Figures.
NOTES: 3.1, part 2 - Significant Figures
Significant Figures Significant figures in a measurement includes all of the digits that are known, plus a last digit that is estimated. All measurements.
Significant Figures.
Accurate measurements are needed for a valid experiment.
Transparency 2 Click the mouse button or press the Space Bar to display the answers.
Chem 160- Ch # 2l. Numbers from measurements.. Measurements Experiments are performed. Numerical values or data are obtained from these measurements.
Accuracy and Precision
Unit 1- Units and Measurement Chemistry. Scientific Notation, Measurement, Accuracy, Precision, Error.
Significant Figures. What is a significant figure? There are 2 kinds of numbers: 1. Exact : Known with certainty. Example: the number of students in this.
Chapter 1 Lesson4. Physical Science  There are 2 kinds of numbers: ◦ Exact: the amount of money in your account. Known with certainty.
Significant Figures Chemistry. Exact vs approximate There are 2 kinds of numbers: 1.Exact: the amount of money in your account. Known with certainty.
Significant Digits Measurements. Description and Measurement  Key Vocabulary  Precision  Accuracy.
 There are 2 kinds of numbers:  Exact: the amount of money in your account. Known with certainty.  Approximate: weight, height— anything MEASURED.
Splash Screen Example 9-2b Objective Find the circumference of circles.
Significant Figures. What is a significant figure? The precision of measurements are indicated based on the number of digits reported. Significant figures.
Transparency 2 Click the mouse button or press the Space Bar to display the answers.
Scientific Measurement Measurements and their Uncertainty Dr. Yager Chapter 3.1.
Slide 1 of 48 Measurements and Their Uncertainty
Slide 1 of 48 Measurements and Their Uncertainty
Lesson 9 Contents Example 1Identify Precision Units Example 2Identify Significant Digits Example 3Identify Significant Digits Example 4Add Measurements.
Conversions About them Why we shouldn’t need them How to use them.
All measurements are subject to uncertainties. All instruments used are influenced by external circumstances, and the accuracy of a measurement may be.
Lesson 16 Solving Problems With Measures. Example 1  Jeff cut a string 4 feet long into three equal pieces. How long are the pieces?  Strategy: Change.
Significant Digits or Significant Figures. WHY??? The number of significant figures in a measurement is equal to the number of digits that are known with.
Significant Figures. Significant Figure Rules 1) ALL non-zero numbers (1,2,3,4,5,6,7,8,9) are ALWAYS significant. 1) ALL non-zero numbers (1,2,3,4,5,6,7,8,9)
Defining Success Lesson 11 M.6.NS.4 fluently add, subtract, multiply and divide multi-digit decimals using the standard algorithm for each operation.
Significant Figures Chemistry I. Significant Figures The numbers reported in a measurement are limited by the measuring tool Significant figures in a.
Significant Figures Box and Dot Method. Step 1  Draw a box around all nonzero digits, beginning with the leftmost nonzero digit and ending with the rightmost.
Chapter 3.1 Accuracy and Precision Significant Figures.
Attend to Precision © 2012 Project Lead The Way, Inc.Introduction to Engineering Design.
Click the mouse button or press the Space Bar to display the answers.
Significant Figures in Calculations
Significant Figures in Calculations
Aim: Why are Significant Figures Important?
Significant Numbers in Calculations
Significant Figures.
Significant Digits or Significant Figures
Accuracy and Precision
Precision and Accuracy
Measurement Schmeasurement
Measurement Schmeasurement
Scientific Notation Scientific notation takes the form: M x 10n
Sig Fig Math and Measurement
Scientific Notation Scientific notation takes the form: M x 10n
Measurement and uncertainties
Measurements and Sig Figs
Significant Figures.
Conveys the precision of a measuring tool.
Accuracy and Precision
Significant Figures.
Significant Figures in Calculations
Significant Figures Overview
Presentation transcript:

Splash Screen

Example 9-5b Objective Analyze measurement

Example 9-5b Vocabulary Precision The precision of a measurement depends on the unit of measure. The smaller the unit, the more precise the measurement is

Example 9-5b Vocabulary Significant digits All of the digits of a measurement that are known to be accurate plus one estimated digit zeros between the last non-digit number and the decimal are not significant zeros to the right of the decimal are significant

Lesson 9 Contents Example 1Identify Precision Units Example 2Identify Significant Digits Example 3Identify Significant Digits Example 4Add Measurements Example 5Multiply Measurements

Example 9-1a Identify the precision unit of the thermometer. Look at the scale between 0 and 10 Precision is the smallest unit of measurement used There are 5 has marks Divide 10 by 5 10  5 2 Add dimensional analysis Answer: degrees

Example 9-1b Identify the precision unit of the ruler. Answer: inch

Example 9-2a Determine the number of significant digits in the measure 5,000 feet. Answer: Write the number There are 3 zeros between the last non-digit number and the decimal so they are not significant 1 significant digit 5,000 Zeros between the last non-digit number and the decimal are not significant

Example 9-2a Determine the number of significant digits in the measure 30,080 feet. Answer: 4 significant digits

Example 9-2b Determine the number of significant digits in the measure 21.0 miles. Answer: Write the number 21.0 Zeros to the right of the decimal are significant 3 significant digits

Example 9-2b Determine the number of significant digits in the measure 4, miles. Answer: 6 significant digits

Example 9-3a Determine the number of significant digits in the measure ounces. Answer: 5 significant digits Write the number significant digits to the left of the decimal 2 significant digits to the right of the decimal

Example 9-3b Determine the number of significant digits in the measure centimeters. Answer: 5 significant digits

Example 9-4a MAIL Venita took four packages to the post office. They weighed 1.27 pounds, 3.45 pounds, pound, and 2.7 pounds. Write the combined weight of her mail using correct precision. Answer: 7.9 pounds decimal places 3 decimal places 1 decimal place Write numbers lining up the decimals Add (use calculator) Find the number with the least decimal places Write answer with 1 decimal place

Example 9-4b DELI Veric bought 1.5 pounds of turkey, 0.75 pound of roast beef, 2.4 pounds of ham, and 0.5 pound of salami. Write the combined weight of the lunch meat that Veric bought using correct precision. Answer: 5.2 lb

Example 9-5a Use the correct number of significant digits to find the volume of the cylinder. Write formula for volume of cylinder Replace r with in V =   (4.125 in ) 2 Replace h with 3.5 in  3.5 in Follow order of operations P E MD AS Evaluate (4.125) 2 V =   in 2  3.5 in

Example 9-5a Use the correct number of significant digits to find the volume of the cylinder. Multiply numbers V =   (4.125 in ) 2  3.5 in V =   in 2  3.5 in V = Multiply units in 3 Determine number with the least significant digits 3.5 has 2 significant digits, so round answer to 2 significant digits V = 190 in 3 Answer:

Example 9-5b Use the correct number of significant digits to find the volume of the rectangular prism. Answer: *

End of Lesson 9 Assignment Lesson 7:9 Measurement: Precision and Significant Digits All