Lesson 5: Significant Digits. AKA Significant Figures

Size: px
Start display at page:

Download "Lesson 5: Significant Digits. AKA Significant Figures"

Transcription

1 Lesson 5: Significant Digits AKA Significant Figures

2 First, take HW out to be checked. Keep it out. In CJ, copy down info from board. Keep CJ open to today s date at the top corner of your desk. On your Do Now sheet, copy and answer the questions/pictures below. 1. Length of line: 2. How many estimated digits should you record? 3. Draw a line that is 1.42 cm. (draw the ruler too)

3 TEST #1 COMING UP 6S, 6O = Friday Oct. 12 th 6Ga, 6I = Monday Oct. 15 th Multiple choice. Cumulative. Bring your own calculator. I will not provide you one during the test.

4 Lesson 5: Significant Digits AKA Significant Figures

5 Measurement The in last digit measurements (underlined) is an estimate because the liquid level falls in between the lines.

6 Measurement Numbers from a measurement are. never exact values They always have some uncertainty due to the limitations of the measuring device and the skill level of the person taking the measurement.

7 Different tools have different degrees of. Measurements should always have all the digits that are known plus one estimated digit. precision

8 Volumetric Flask 1000 ml +/ ml Erlenmeyer Flask 1000 ml +/- 5% Each tool will tell you the measure of precision.

9 4.31 cm 3.5 cm Pink digit is estimated 5 cm Top one Lines correspond to smallest length increments Which ruler is most precise? Why? The number of digits in each measurement correspond to the precision of the instrument.

10 Q: What are Significant Digits? A: Digits that carry meaning contributing to the and of the measurement precision accuracy The number of significant figures in an expression indicates the confidence or precision with which an engineer or scientist states a quantity.

11 It s important to be honest when reporting a measurement, so that your measurement does not appear to be more accurate than the equipment used to make the measurement allows.

12 Too many estimated digits Correct Line isn t that close to 5 cm

13 Mike: 3.97 cm Correct Incorrect. Reason: Correct Andy: 4 cm Correct Incorrect. Reason: Rounded up, not enough digits Vanessa: 3.89 cm Correct Incorrect. Reason: Line is longer than 3.9 cm Michele: 3.9 cm Correct Incorrect. Reason: Did not include an estimated digit

14 Q: How do we count the number of significant digits in a measurement? number of digits that are known plus one estimated digit A: It s the are considered significant in a measured quantity

15 First, take HW out to be checked. Keep it out. In CJ, copy down info from board. Keep CJ open to today s date at the top corner of your desk. On your Do Now sheet, copy and answer the questions/pictures below. 1. Length of line? 2. A number that is very accurate and precise has more / less significant digits than a number that is not as accurate or precise g is more / less precise than 1 g.

16 Significant Digits RULES Non zero digits. All non-zero digits are significant Exact numbers. Exact numbers have an infinite number of significant digits. Includes: counting numbers (counting a number of definite things) and defined numbers (example: 100 cm = 1 m). There is no uncertainty with these numbers.

17 Significant Digits RULES SIGNIFICANT ZEROS between nonzero digits 205 ml = significant digits 2.08 g = significant digits L = significant digits = significant digits at the end of a number that has a decimal point s = significant digits mg = significant digits 4.00 ml = significant digits 30. g = significant digits

18 Significant Digits RULES SIGNIFICANT ZEROS between nonzero digits 205 ml = 3 significant digits 2.08 g = _3 significant digits L = 4 significant digits = 5 significant digits at the end of a number that has a decimal point s = 3 significant digits mg = 5 significant digits 4.00 ml = 3 significant digits 30. g = _2 significant digits

19 Significant Digits RULES NON-SIGNIFICANT ZEROS before the first nonzero digit mg = significant digits dl = significant digits at the end of a number without a decimal point 2000 L = significant digit 840 K = significant digits

20 Significant Digits RULES NON-SIGNIFICANT ZEROS before the first nonzero digit mg = 2 significant digits dl = 3 significant digits at the end of a number without a decimal point 2000 L = 1 significant digit 840 K = 2 significant digits

21 Q: Are non-significant zeros still important? YES! A: These are placeholder zeros and they indicate where the decimal point belongs.

22 Sig. Digits:

23

24

25 Rounding with Significant Digits When using calculators, we often obtain numbers that have too many digits than are. We must round and drop the excess digits to properly and fairly express measurements. reasonable

26 4 or less? round down and stay the same 5 or more? round up

27

28 Multiplication & Division The answer must contain the same number of significant digits as the measurement that has the least number of significant digits.

29

30

31

32 Additional Vocabulary The more significant digits a measurement has, the more accurate and precise it is. Your measurement should accurately reflect the accuracy and precision of your instrument. Accuracy: how close a measurement is to the correct value for that measurement Precision: refers to how close two or more measurements are to each other, regardless of whether those measurements are accurate or not. A precise measuring tool is one that can measure values in very small increments.

Base unit-a defined unit of measurement based on an object or event in the physical world. Length

Base unit-a defined unit of measurement based on an object or event in the physical world. Length Base unit-a defined unit of measurement based on an object or event in the physical world Five base units: Temperature Mass Length Time Energy Derived unit-a unit of measurement defined by a combination

More information

Notes: Measurement and Calculation

Notes: Measurement and Calculation Name Chemistry-PAP Per. I. The Basics of Measurement Notes: Measurement and Calculation A. Measurement Most provide quantitative information, but because they are obtained experimentally, they are inexact.

More information

Why the fuss about measurements and precision?

Why the fuss about measurements and precision? Introduction In this tutorial you will learn the definitions, rules and techniques needed to record measurements in the laboratory to the proper precision (significant figures). You should also develop

More information

precision accuracy both neither

precision accuracy both neither I. Measurement and Observation There are two basic types of data collected in the lab: Quantitative : numerical information (e.g., the mass of the salt was.45 g) Qualitative : non-numerical, descriptive

More information

Appendix A: Significant Figures and Error Analysis

Appendix A: Significant Figures and Error Analysis 1 Appendix A: Significant Figures and Error Analysis Every measurement of a physical quantity contains some amount of uncertainty or error. We often speak of a certain number or measurement as being precise

More information

What s in a Scientist s Toolbox?

What s in a Scientist s Toolbox? What s in a Scientist s Toolbox? OBJECTIVES After completing this lab you will be able to: Make different kinds of scientific measurements with several common laboratory tools. Use assorted measurement

More information

Measurement. Scientific Notation. Measurements and Problem Solving. Writing Numbers in Scientific Notation

Measurement. Scientific Notation. Measurements and Problem Solving. Writing Numbers in Scientific Notation Measurement Chapter 2 Measurements and Problem Solving Quantitative observation Comparison based on an accepted scale e.g. Meter stick Has 2 parts number and unit Number tells comparison Unit tells scale

More information

Warm-up: Are accuracy and precision the same thing? (If so do you want to bet the house on it?)

Warm-up: Are accuracy and precision the same thing? (If so do you want to bet the house on it?) Obj: Students will: 1. Distinguish between accuracy and precision. 2. Examine various pieces of lab equipment for their accuracy. 3. Define and identify significant figures. Warm-up: Are accuracy and precision

More information

Significant Digits What digits are important when recording a measurement?

Significant Digits What digits are important when recording a measurement? Significant Digits What digits are important when recording a measurement? Why? Scientists do a lot of measuring. When scientists use an instrument (ruler, graduated cylinder, spectrophotometer, balance

More information

Measurement. New Topics accuracy vs. precision rounding in chemistry significant figures determining uncertainty of a measurement % error moles - 1 -

Measurement. New Topics accuracy vs. precision rounding in chemistry significant figures determining uncertainty of a measurement % error moles - 1 - Measurement Unit Description In this unit we will focus on the mathematical tools we use in science, especially chemistry the metric system and moles. We will also talk about how to gauge the accuracy

More information

Introductory Chemistry: A Foundation, 6 th Ed. Introductory Chemistry, 6 th Ed. Basic Chemistry, 6 th Ed.

Introductory Chemistry: A Foundation, 6 th Ed. Introductory Chemistry, 6 th Ed. Basic Chemistry, 6 th Ed. Introductory Chemistry: A Foundation, 6 th Ed. Introductory Chemistry, 6 th Ed. Basic Chemistry, 6 th Ed. by Steven S. Zumdahl, Donald J. DeCoste University of Illinois Chapter 2 Measurements and Calculations

More information

Chemistry: The Study of Change Chang & Goldsby 12 th edition

Chemistry: The Study of Change Chang & Goldsby 12 th edition Chemistry: The Study of Change Chang & Goldsby 12 th edition modified by Dr. Hahn Chapter 1 Example 1.4 Determine the number of significant figures in the following measurements: (a)478 cm (b)6.01 g end

More information

A.0 SF s-uncertainty-accuracy-precision

A.0 SF s-uncertainty-accuracy-precision A.0 SF s-uncertainty-accuracy-precision Objectives: Determine the #SF s in a measurement Round a calculated answer to the correct #SF s Round a calculated answer to the correct decimal place Calculate

More information

Measurements, Sig Figs and Graphing

Measurements, Sig Figs and Graphing Measurements, Sig Figs and Graphing Chem 1A Laboratory #1 Chemists as Control Freaks Precision: How close together Accuracy: How close to the true value Accurate Measurements g Knowledge Knowledge g Power

More information

How long is the arrow?

How long is the arrow? 1.2 Measurements Measuring We have all measured things before, but how would you define it? Measurement: comparing an unknown quantity to a standard unit (known quantity) How long is the arrow? Any measurement

More information

Manager: Scribe: Reporter: Per. Significant Zeros. Which zeros are significant in a measurement, and which are simply important?

Manager: Scribe: Reporter: Per. Significant Zeros. Which zeros are significant in a measurement, and which are simply important? Manager: Scribe: Reporter: Per Significant Zeros Which zeros are significant in a measurement, and which are simply important? When working with measurements, it is important to know which digits in the

More information

Section 3 Using Scientific Measurements. Look at the specifications for electronic balances. How do the instruments vary in precision?

Section 3 Using Scientific Measurements. Look at the specifications for electronic balances. How do the instruments vary in precision? Lesson Starter Look at the specifications for electronic balances. How do the instruments vary in precision? Discuss using a beaker to measure volume versus using a graduated cylinder. Which is more precise?

More information

(Significant Digits are in BOLD type and the non-significant digits are underlined)

(Significant Digits are in BOLD type and the non-significant digits are underlined) Name Per. Date Significant Digits Worksheet Significant digits (or significant figures) are used to represent the accuracy of a measurement. In a measurement the significant digits represent all the reliable

More information

Chapter 2 Measurements & Calculations. Quantity: A thing that can be measured. ex. Length (6.3 ft), mass (35 kg), and time (7.2 s)

Chapter 2 Measurements & Calculations. Quantity: A thing that can be measured. ex. Length (6.3 ft), mass (35 kg), and time (7.2 s) Chapter 2 Measurements & Calculations Quantity: A thing that can be measured. ex. Length (6.3 ft), mass (35 kg), and time (7.2 s) Measurements can be expressed in a variety of units: Example: length(cm,

More information

POGIL: Significant Zeros Why?

POGIL: Significant Zeros Why? Name: Date: Period: Chemistry POGIL: Significant Zeros Why? When working with measurements, it is important to know which digits in the measurement are significant and which are not. Non-zero digits are

More information

Tutorial 2: Expressing Uncertainty (Sig Figs, Scientific Notation and Rounding)

Tutorial 2: Expressing Uncertainty (Sig Figs, Scientific Notation and Rounding) Tutorial 2: Expressing Uncertainty (Sig Figs, Scientific Notation and Rounding) Goals: To be able to convert quantities from one unit to another. To be able to express measurements and answers to the correct

More information

CHM 130 Measurements, Significant Figures, Derived Quantities, and Unit Conversions

CHM 130 Measurements, Significant Figures, Derived Quantities, and Unit Conversions CHM 130 Measurements, Significant Figures, Derived Quantities, and Unit Conversions Objectives 1. Use measuring tools correctly 2. Read and record measurements correctly (significant digits and unit) 3.

More information

Topic 11: Measurement and Data Processing and Analysis. Topic Uncertainties and Errors in Measurement and Results

Topic 11: Measurement and Data Processing and Analysis. Topic Uncertainties and Errors in Measurement and Results Topic 11: Measurement and Data Processing and Analysis Topic 11.1- Uncertainties and Errors in Measurement and Results Key Terms Random Error- above or below true value, usually due to limitations of equipment

More information

Metric Prefixes UNITS & MEASUREMENT 10/6/2015 WHY DO UNITS AND MEASUREMENT MATTER?

Metric Prefixes UNITS & MEASUREMENT 10/6/2015 WHY DO UNITS AND MEASUREMENT MATTER? UNITS & MEASUREMENT WHY DO UNITS AND MEASUREMENT MATTER? Chemistry In Action On 9/3/99, $15,000,000 Mars Climate Orbiter entered Mar s atmosphere 100 km (6 miles) lower than planned and was destroyed by

More information

Significant Figures. Significant Figures 18/02/2015. A significant figure is a measured or meaningful digit.

Significant Figures. Significant Figures 18/02/2015. A significant figure is a measured or meaningful digit. Significant Figures When counting objects, it is easy to determine the EXACT number of objects. Significant Figures Unit B1 But when a property such as mass, time, volume, or length is MEASURED, you can

More information

Notes Chapter 2: Measurements and Calculations. It is used to easily and simply write very large numbers, and very small numbers.

Notes Chapter 2: Measurements and Calculations. It is used to easily and simply write very large numbers, and very small numbers. Scientific Notation Notes Chapter 2: Measurements and Calculations It is used to easily and simply write very large numbers, and very small numbers. It begins with a number greater than zero & less than

More information

Lab 1: Measurement. PART 1: Exponential Notation: Powers of 10

Lab 1: Measurement. PART 1: Exponential Notation: Powers of 10 Lab 1: Measurement Equipment: 2 meter sticks You will find these websites useful for today s lab: SI Base Units: http://physics.nist.gov/cuu/units/units.html Metric prefixes: http://physics.nist.gov/cuu/units/prefixes.html

More information

1. Volume=amount of an object takes up Ways we can measure volume:

1. Volume=amount of an object takes up Ways we can measure volume: Chemistry Ms. Ye Name Date Block A physical property is something that can be measured or observed without changing the chemical composition of the substance. Mass, volume, and density or examples of physical

More information

Measurements. October 06, 2014

Measurements. October 06, 2014 Measurements Measurements Measurements are quantitative observations. What are some kinds of quantitative observations you might make? Temperature Volume Length Mass Student A and Student B measured the

More information

Introduction to 1118 Labs

Introduction to 1118 Labs Name: Partner(s): 1118 section: Desk # Date: Introduction to 1118 Labs Introductory materials are at: www.langaraphysics.com/lab.html. You may find following 3 links useful for this lab: Measurements:

More information

Uncertainty in Measurements

Uncertainty in Measurements Uncertainty in Measurements! Two kinds of numbers " Exact! counted values " 2 dogs " 26 letters " 3 brothers! defined numbers " 12 inches per foot " 1000 g per kilogram " 2.54 cm per inch Metric Practice!

More information

Name. Academic Chemistry Measurement and Calculations. Notes. Measurement cincochem.pbworks.com 1

Name. Academic Chemistry Measurement and Calculations. Notes. Measurement cincochem.pbworks.com 1 Name Academic Chemistry Measurement and Calculations Notes Measurement cincochem.pbworks.com 1 Academic Chemistry SIGNIFICANT FIGURES Unit 1 Significant figures are the digits in a measurement that you

More information

CHAPTER 2: SCIENTIFIC MEASUREMENTS

CHAPTER 2: SCIENTIFIC MEASUREMENTS CHAPTER 2: SCIENTIFIC MEASUREMENTS Problems: 1-26, 37-76, 80-84, 89-93 2.1 UNCERTAINTY IN MEASUREMENTS measurement: a number with attached units To measure, one uses instruments = tools such as a ruler,

More information

Lesson 7 Scientific Notation SI Units Unit Conversions

Lesson 7 Scientific Notation SI Units Unit Conversions Lesson 7 Scientific Notation SI Units Unit Conversions Do Now 6I, 6Ga 10.23.18 Copy down info from CJ board. Keep CJs out and open on desk throughout class. On your DO NOW PAGE #4, copy and answer the

More information

Tools of Chemistry. Measurement Scientific Method Lab Safety & Apparatus

Tools of Chemistry. Measurement Scientific Method Lab Safety & Apparatus Tools of Chemistry Measurement Scientific Method Lab Safety & Apparatus Scientific Notation Scientific Notation a number described as a power of 10 (used for very large or small numbers) 1000 = 1 X 10

More information

Allows us to work with very large or small numbers more easily. All numbers are a product of 10.

Allows us to work with very large or small numbers more easily. All numbers are a product of 10. Unit 1: Measurements Scientific Notation : Allows us to work with very large or small numbers more easily. All numbers are a product of 10. M x 10n M= signif. digit [ 1 < M < 10 ] n = an integer move the

More information

The periodic table currently lists 116 different atoms. New atoms are being discovered.

The periodic table currently lists 116 different atoms. New atoms are being discovered. CHEM100 Week 1 Notes Page 1 of 11 Chemistry is the study of matter. Matter is made up of atoms. The periodic table currently lists 116 different atoms. New atoms are being discovered. Atoms consist of

More information

Introduction to Measurement

Introduction to Measurement Units and Measurement Introduction to Measurement One of the most important steps in applying the scientific method is experiment: testing the prediction of a hypothesis. Typically we measure simple quantities

More information

TOPIC 3: READING AND REPORTING NUMERICAL DATA

TOPIC 3: READING AND REPORTING NUMERICAL DATA Page 1 TOPIC 3: READING AND REPORTING NUMERICAL DATA NUMERICAL DATA 3.1: Significant Digits; Honest Reporting of Measured Values Why report uncertainty? That is how you tell the reader how confident to

More information

UNIT 1: NATURE OF SCIENCE

UNIT 1: NATURE OF SCIENCE Nature of Science UNIT 1: NATURE OF SCIENCE Chapter 1.1-1.3, pages 6-26 Honors Physical Science Pure science aims to come to a common understanding of the universe Scientists suspend judgment until they

More information

The Grammar and Etiquette of Scientific Math By T. Webb HHS

The Grammar and Etiquette of Scientific Math By T. Webb HHS The Grammar and Etiquette of Scientific Math By T. Webb HHS You can be a mathematician without a lot of science, however, you cannot be a scientist without math Part 1 - Terminology in Basic Data Analysis

More information

Appendix F. Treatment of Numerical Data. I. Recording Data F-1

Appendix F. Treatment of Numerical Data. I. Recording Data F-1 Treatment of umerical Data I. Recording Data When numerical data are recorded, three kinds of information must be conveyed: the magnitude of the number, how well the number is known, and the units used

More information

PHYSICS 30S/40S - GUIDE TO MEASUREMENT ERROR AND SIGNIFICANT FIGURES

PHYSICS 30S/40S - GUIDE TO MEASUREMENT ERROR AND SIGNIFICANT FIGURES PHYSICS 30S/40S - GUIDE TO MEASUREMENT ERROR AND SIGNIFICANT FIGURES ACCURACY AND PRECISION An important rule in science is that there is always some degree of uncertainty in measurement. The last digit

More information

see page 8 of these notes )

see page 8 of these notes ) UNIT 1 Note Packet INTRODUCTION TO CHEMISTRY Name: METRICS AND MEASUREMENT In the chemistry classroom and lab, the metric system of measurement is used, so it is important to know what you are measuring,

More information

Honors Chemistry 2016 Summer Assignment

Honors Chemistry 2016 Summer Assignment This Honors Chemistry Summer Assignment will review mathematical concepts necessary when performing mathematical calculation and laboratory experiments and focus on laboratory safety. Measurements are

More information

Chapter 2. Measurements and Calculations

Chapter 2. Measurements and Calculations Chapter 2 Measurements and Calculations Section 2.1 Scientific Notation Measurement Quantitative observation. Has 2 parts number and unit. Number tells comparison. Unit tells scale. If something HAS a

More information

SIGNIFICANT FIGURES. x 100%

SIGNIFICANT FIGURES. x 100% Page 1 SIGNIFICANT FIGURES ASSIGNED READING: Zumdahal, et.al, Chemistry (10 th ed.), Chapter 1, Sec. 4 and 5. I. Accuracy and Precision It is important to remember, here at the outset of this course, that

More information

Welcome to Chemistry! Sept 11, 2015 Friday

Welcome to Chemistry! Sept 11, 2015 Friday Welcome to Chemistry! Sept 11, 2015 Friday DO NOW: How many sig figs in this number? 2001.1109 Round this number to 3 sig figs...... Objectives: 1. Quantitative Tools for Chemistry: complete calculations

More information

Chapter 2 Math Skills

Chapter 2 Math Skills Chapter 2 Math Skills 2.1 Measurements Measurement number with a unit Units are very important o A student wouldn t ask a teacher Could you please hand me 6? The student would instead ask, Could you please

More information

Notes: Unit 1: Math and Measurement

Notes: Unit 1: Math and Measurement Name: Regents Chemistry: Notes: Unit 1: Math and Measurement www.chempride.weebly.com Key Ideas Major Understandings: o Chemistry is the study of matter: Matter takes up space and has mass. (K- 4, 3.1a)

More information

Notes: Unit 1: Math and Measurement

Notes: Unit 1: Math and Measurement Name: Regents Chemistry: Notes: Unit 1: Math and Measurement www.chempride.weebly.com Key Ideas Major Understandings: o Chemistry is the study of matter: Matter takes up space and has mass. (K- 4, 3.1a)

More information

Accuracy and Precision of Laboratory Glassware: Determining the Density of Water

Accuracy and Precision of Laboratory Glassware: Determining the Density of Water Accuracy and Precision of Laboratory Glassware: Determining the Density of Water During the semester in the general chemistry lab, you will come into contact with various pieces of laboratory glassware.

More information

Chemistry Monday, January 23, 2017

Chemistry Monday, January 23, 2017 Chemistry Monday, January 23, 2017 Do-Now: Ch. 11 Quiz Review 1. Write down today s FLT 2. List three symbols used in chemical equations, and state their meaning. 3. Copy: S 8 + O 2 à SO 2 4. Identify

More information

Every time a measurement is taken, we must be aware of significant figures! Define significant figures.

Every time a measurement is taken, we must be aware of significant figures! Define significant figures. SCHM 103: FUNDAMENTALS OF CHEMISTRY Ch. 2: Numerical Side of Chemistry Types of data collected in experiments include: Qualitative: Quantitative: Making Measurements Whenever a piece of data is collected,

More information

Uncertainty, Error, and Precision in Quantitative Measurements an Introduction 4.4 cm Experimental error

Uncertainty, Error, and Precision in Quantitative Measurements an Introduction 4.4 cm Experimental error Uncertainty, Error, and Precision in Quantitative Measurements an Introduction Much of the work in any chemistry laboratory involves the measurement of numerical quantities. A quantitative measurement

More information

CHEM134, Fall 2018 Dr. Al-Qaisi Chapter 1 review

CHEM134, Fall 2018 Dr. Al-Qaisi Chapter 1 review Upon completion of this chapter, you should be able to: Ø Know the Scientific approach to knowledge Ø Define Mater, atom and molecule ü Explain and give examples of the following: element, mixture, mixture

More information

CHEM Chapter 1

CHEM Chapter 1 CHEM 1110 Chapter 1 Chapter 1 OVERVIEW What s science? What s chemistry? Science and numbers Measurements Unit conversion States of matter Density & specific gravity Describing energy Heat and its transfer

More information

Accuracy of Measurement: how close your measured value is to the actual measurement

Accuracy of Measurement: how close your measured value is to the actual measurement Standard: an exact quantity that people use to make measurements Good Example: a meter stick (everyone one knows the length of a meter) Bad Example: Ms. Pluchino s foot (everyone does not know how big

More information

How do physicists study problems?

How do physicists study problems? What is Physics? The branch of science that studies the physical world (from atoms to the universe); The study of the nature of matter and energy and how they are related; The ability to understand or

More information

Significant Digits and Measurement

Significant Digits and Measurement Significant Digits and Measurement What digits are significant when recording a measurement? Scientists do a lot of measuring. When scientists use an instrument (such as a ruler, graduated cylinder, spectrophotometer

More information

INTRODUCTORY CHEMISTRY Concepts and Critical Thinking Seventh Edition by Charles H. Corwin

INTRODUCTORY CHEMISTRY Concepts and Critical Thinking Seventh Edition by Charles H. Corwin Lecture INTRODUCTORY CHEMISTRY Concepts and Critical Thinking Seventh Edition by Charles H. Corwin Introduction to Chemistry by Christopher G. Hamaker Illinois State University Evolution of Chemistry The

More information

Chemistry Basic Science Concepts. Observations: are recorded using the senses. Examples: the paper is white; the air is cold; the drink is sweet.

Chemistry Basic Science Concepts. Observations: are recorded using the senses. Examples: the paper is white; the air is cold; the drink is sweet. Note Packet # 1 1 Chemistry: the study of matter. Chemistry Basic Science Concepts Matter: anything that has mass and occupies space. Observations: are recorded using the senses. Examples: the paper is

More information

Numbers in Science Exploring Measurements, Significant Digits, and Dimensional Analysis

Numbers in Science Exploring Measurements, Significant Digits, and Dimensional Analysis Numbers in Science Exploring Measurements, Significant Digits, and Dimensional Analysis TAKING MEASUREMENTS The accuracy of a measurement depends on two factors: the skill of the individual taking the

More information

THE GRAMMAR AND ETIQUETTE OF SCIENTIFIC MATH

THE GRAMMAR AND ETIQUETTE OF SCIENTIFIC MATH THE GRAMMAR AND ETIQUETTE OF SCIENTIFIC MATH You can be a mathematician without a lot of science However, you can t be a scientist without math T.Webb HHS Part 1 - Terminology in Basic Data Analysis Quantitative

More information

Chemistry Day 39. Friday, December 14 th Monday, December 17 th, 2018

Chemistry Day 39. Friday, December 14 th Monday, December 17 th, 2018 Chemistry Day 39 Friday, December 14 th Monday, December 17 th, 2018 Do-Now: Reactions Quiz Do-Now 1. Write down today s FLT 2. Copy: KCl + H 2 O à? 3. Identify the type of reaction in #2. 4. Predict the

More information

In this lab you are asked to make a series of volume and temperature measurements and record the number of significant figures in each measurement.

In this lab you are asked to make a series of volume and temperature measurements and record the number of significant figures in each measurement. CHEM 0011 1 Experiment 2 Measurement Objectives 1. To understand the accuracy of various types of graduated glassware. 2. To measure volumes of liquids using a graduated cylinder. 3. To measure the volume

More information

COLLEGE PHYSICS. Chapter 1 INTRODUCTION: THE NATURE OF SCIENCE AND PHYSICS. Lesson 2

COLLEGE PHYSICS. Chapter 1 INTRODUCTION: THE NATURE OF SCIENCE AND PHYSICS. Lesson 2 COLLEGE PHYSICS Chapter 1 INTRODUCTION: THE NATURE OF SCIENCE AND PHYSICS Lesson 2 Video Narrated by Jason Harlow, Physics Department, University of Toronto MEASUREMENTS Here are two different kinds of

More information

Significant Figures: A Brief Tutorial

Significant Figures: A Brief Tutorial Significant Figures: A Brief Tutorial 2013-2014 Mr. Berkin *Please note that some of the information contained within this guide has been reproduced for non-commercial, educational purposes under the Fair

More information

CHEM 1305: Introductory Chemistry

CHEM 1305: Introductory Chemistry CHEM 1305: Introductory Chemistry Basic Science Skills From Chapter 1, PSS and 2 Textbook Introductory Chemistry: Concepts and Critical Thinking Seventh Edition by Charles H. Corwin Measurements In chemistry,

More information

Welcome to Chemistry

Welcome to Chemistry Welcome to Chemistry Introduction to Chemistry Exit Question What kind of skills and strategies did you need to be successful in this class activity? Day 2 9/10/13 QOD: What are my goals in this course?

More information

CHM Accuracy, Precision, and Significant Figures (r14) C. Taylor 1/10

CHM Accuracy, Precision, and Significant Figures (r14) C. Taylor 1/10 CHM 110 - Accuracy, Precision, and Significant Figures (r14) - 2014 C. Taylor 1/10 Introduction Observations are vitally important to all of science. Some observations are qualitative in nature - such

More information

Chapter 1. Chemistry and Measurements

Chapter 1. Chemistry and Measurements Chapter 1 Chemistry and Measurements Section 1-1 Chemistry: the study of matter and the changes it undergoes. macroscopic: relating to large-scale analysis, visible to the naked eye microscopic: not visible

More information

Do Now: Use the ruler below to answer the following questions

Do Now: Use the ruler below to answer the following questions Chemistry Ms. Ye Name Date Block Do Now: Use the ruler below to answer the following questions 1. What is each tick mark worth on the ruler? 2. When measuring, to which decimal place should you estimate

More information

Page 24 Monday August 03, 2015

Page 24 Monday August 03, 2015 Page Monday August 0, 05 Convert with-in the metric system Practice: How many. Practice: How many.. Centimeters in a meter?. Grams in Kilogram?. Liters in Kiloliter?. Meters in Kilometer? 5. Millimeters

More information

Uncertainty in numbers

Uncertainty in numbers 1.03 Accuracy, Precision and Significant Figures Uncertainty in numbers Story: Taxi driver (13 years experience) points to a pyramid "...this here pyramid is exactly 4511 years old". After a quick calculation,

More information

Scientific Notation. Sig. Figs. Estimation Density. Unit cancelation

Scientific Notation. Sig. Figs. Estimation Density. Unit cancelation Unit cancelation Sig. Figs. Scientific Notation Estimation Density 100 100 100 100 100 200 200 200 200 200 300 300 300 300 300 400 400 400 400 400 500 500 500 500 500 When doing unit conversions, this

More information

Chemistry Day 37. Monday, December 10 th Tuesday, December 11 th, 2018

Chemistry Day 37. Monday, December 10 th Tuesday, December 11 th, 2018 Chemistry Day 37 Monday, December 10 th Tuesday, December 11 th, 2018 Do-Now: Reaction Types CN 1. Write down today s FLT 2. What does the Law of Conservation of Mass tell us? Aluminum oxide yields solid

More information

Using Scientific Measurements

Using Scientific Measurements Section 3 Main Ideas Accuracy is different from precision. Significant figures are those measured precisely, plus one estimated digit. Scientific notation is used to express very large or very small numbers.

More information

1m 100cm=1m =1 100cm 1m 89cm = 0.89m 100cm

1m 100cm=1m =1 100cm 1m 89cm = 0.89m 100cm Units and Measurement Physics 40 Lab 1: Introduction to Measurement One of the most important steps in applying the scientific method is experiment: testing the prediction of a hypothesis. Typically we

More information

Express in Scientific Notation

Express in Scientific Notation Scientific Notation A shorthand method of displaying very large (distance to the sun) or very small numbers (lengths of atoms). Consists of a coefficient, a base 10, and an exponent e.g. 3.95 x 10 3 The

More information

Chapter 1 and 3 Guided Notes

Chapter 1 and 3 Guided Notes What is Chemistry? Chemistry: 5 areas of Chemistry: o Organic- o Inorganic- o Biochemistry- o Analytical- o Physical- Chapter 1 and 3 Guided Notes Scientific Method: 1. 2. 3. 4. 5. Variables: -The variable

More information

experiment3 Introduction to Data Analysis

experiment3 Introduction to Data Analysis 63 experiment3 Introduction to Data Analysis LECTURE AND LAB SKILLS EMPHASIZED Determining what information is needed to answer given questions. Developing a procedure which allows you to acquire the needed

More information

Significant Figures a.k.a. Significant DIGITS

Significant Figures a.k.a. Significant DIGITS 1. Two students measure the liquid at right. Zoe says 20.3 ml, Brian says 21.50 ml. Describe why EACH student is incorrect. 2. Why do objects float? (tell me what you think) 3. Predict: If I put two cans

More information

Honors Chemistry Summer Packet. Dear Honors Chemistry Student,

Honors Chemistry Summer Packet. Dear Honors Chemistry Student, Dear Honors Chemistry Student, This packet is designed to provide students entering Honors Chemistry with important chemistry-based mathematical skills and chemistry content before the start of the school

More information

3. What is the decimal place of the least significant figure (LSF) in the number 0.152? a. tenths place b. hundredths place c.

3. What is the decimal place of the least significant figure (LSF) in the number 0.152? a. tenths place b. hundredths place c. Name: Significant Digits, Unit Conversions, Graphing and Uncertainties in Measurements =========================================================== Choose the best answer. (30 pts total) Significant Digits,

More information

Every physical or chemical change in matter involves a change in energy.

Every physical or chemical change in matter involves a change in energy. Sec. 2.1 Energy Objectives: 1. Explain that physical and chemical changes in matter involve transfers of energy 2. Apply the law of conservation of energy to analyze changes in matter 3. Distinguish between

More information

MEASUREMENT CALCULATIONS AND. Chapter 2 Chemistry I

MEASUREMENT CALCULATIONS AND. Chapter 2 Chemistry I MEASUREMENT AND CALCULATIONS Chapter 2 Chemistry I 2018-2019 I. SCIENTIFIC METHOD A. SCIENTIFIC METHOD: The Scientific Method is a logical approach to solving problems by observing and collecting data,

More information

Physics 10 Scientific Measurement Workbook Mr. Proctor

Physics 10 Scientific Measurement Workbook Mr. Proctor Physics 10 Scientific Measurement Workbook Mr. Proctor Name: MEASUREMENT OF MATTER - Science 10 textbook reference pages 344-351 The Seven Fundamental Measurements (with units) in Physics are: meter (m)

More information

We estimated the last digit, It's uncertain. These digits were obtained in all measurements. They are certain

We estimated the last digit, It's uncertain. These digits were obtained in all measurements. They are certain 21 Significant figures SIGNIFICANT FIGURES are a way to indicate the amount of uncertainty in a measurement. The significant figures in a measurement are all of the CERTAIN DIGITS plus one and only one

More information

Chemistry 11. First Assignment Scientific Notation

Chemistry 11. First Assignment Scientific Notation First Assignment Scientific Notation This First Assignment may take between 1 hours depending on your background and prior knowledgeplease follow the instructions carefully. a. Read all the information

More information

Significant figures. We estimated the last digit, It's uncertain

Significant figures. We estimated the last digit, It's uncertain 21 Significant figures SIGNIFICANT FIGURES are a way to indicate the amount of uncertainty in a measurement. The significant figures in a measurement are all of the CERTAIN DIGITS plus one and only one

More information

CHM101 Lab Math Review and Significant Figures Grading Rubric

CHM101 Lab Math Review and Significant Figures Grading Rubric Name CHM101 Lab Math Review and Significant Figures Grading Rubric Criteria Points possible Points earned Part A (0.25 each) 3.5 Part B (0.25 each) 2.5 Part C (0.25 each) 1.5 Part D (Q5 0.25 each, Q6 &

More information

Decimal Addition: Remember to line up the decimals before adding. Bring the decimal straight down in your answer.

Decimal Addition: Remember to line up the decimals before adding. Bring the decimal straight down in your answer. Summer Packet th into 6 th grade Name Addition Find the sum of the two numbers in each problem. Show all work.. 62 2. 20. 726 + + 2 + 26 + 6 6 Decimal Addition: Remember to line up the decimals before

More information

EXPERIMENT 1 Chemistry 110 LABORATORY SAFETY

EXPERIMENT 1 Chemistry 110 LABORATORY SAFETY EXPERIMENT 1 Chemistry 110 LABORATORY SAFETY MEASUREMENTS PURPOSE: The Purpose of this laboratory exercise is for the students to develop the skills of measuring length, volume, mass and temperature and

More information

Scientific Notation Review

Scientific Notation Review Summer Packet AP Physics B Use the internet for additional reference on the following problems. Complete all problems!! You must bring this on the first day of school it will count as your first exam!!

More information

Chapter 2 - Measurements and Calculations

Chapter 2 - Measurements and Calculations Chapter 2 - Measurements and Calculations 2-1 The Scientific Method "A logical approach to solving problems by observing and collecting data, formulating hypotheses, testing hypotheses, and formulating

More information

The Science of Chemistry

The Science of Chemistry CHAPTER 1 The Science of Chemistry 1.1 What Chemistry Is About Measurements Using clear standards of measurements, we can communicate more effectively in answering simple questions. 2 1.1 What Chemistry

More information

Dimensional Analysis, SI Units & Significant figures

Dimensional Analysis, SI Units & Significant figures Dimensional Analysis, SI Units & Significant figures WHAT IS CHEMISTRY The study of matter, its composition, structure, properties, and the changes it undergoes & energy changes associated with it. Scientific

More information

Chapter 3 Scientific Measurement

Chapter 3 Scientific Measurement Chapter 3 Scientific Measurement Measurements We make measurements every day: buying products, sports activities, and cooking Qualitative measurements are words, such as heavy or hot Quantitative measurements

More information

The measurements you make in the science laboratory, whether for time,

The measurements you make in the science laboratory, whether for time, Measuring Up Middle Grades Science Middle Grades Measuring Science Up Exploring Experimental Error through Measurement MATERIALS balance beaker, 250 ml copy of Nick and Nack template graduated cylinder,

More information