Catalyst January 7(5-3), 2011 HW OUT! Check out the ‘graph’ to the right. Determine who the “Biggest Rapper Alive” is and back up with at least 2 reasons.

Slides:

Advertisements

Similar presentations

Physics Tool Kit Units (S.I. System - Meters, Kg, S) Unit Conversion Scientific Notation Accuracy and Precision Significant Figures Dimensional Analysis.

Advertisements

Ch. 3, Scientific Measurement

Chapter 2 Measurements and Calculations.

Chemistry Notes Significant Figures & Scientific Notation

Measurements and Calculations

Scientific Measurement

Catalyst – August (6 2 -5), 2010 HOMEWORK OUT PLEASE!  Describe the pattern/trend you see in the first 4. After, fill in the 5 th and 6 th answers. 1)

Observation, Measurement and Calculations Cartoon courtesy of NearingZero.net.

Measurement (Ch 3) Handout #2 answers

Qualitative vs. Quantitative Qualitative = descriptive, non-numerical. ex. : the mornings are getting very cold. Quantitative = numerical, definite measurement.

Data analysis (chapter 2) SI units and the metric system ▫Base units  Time (sec)  Length (m)  Mass (kg)  Temperature (Kelvin)  Derived base units.

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.

Introduction to Chemistry.  Matter  Mass  Weight.

CHAPTER 2 Measurements and Calculations. Scientific Method System  Specific portion of matter that has been selected for study Scientific Method  Logical.

Metric System Based on the decimal system, the metric system is the common system used for scientific measurements.

Uncertainty in Measurements and Significant Figures Group 4 Period 1.

SIG FIGS Section 2-3 Significant Figures Often, precision is limited by the tools available. Significant figures include all known digits plus one estimated.

Measuring and Units.

Significant Figures Suppose we are measuring the length of an object with a meter stick. When using a measuring device, always estimate to the nearest.

Measurement and Significant Figures. Precision and Accuracy What is the difference between precision and accuracy in chemical measurements? Accuracy refers.

Chemistry 3.1 Uncertainty in Measurements. I. Accuracy, Precision, & Error A. Accuracy – how close a measurement comes to the “true value”. 1. Ex: Throwing.

Unit 1- Units and Measurement Chemistry. Scientific Notation, Measurement, Accuracy, Precision, Error.

EQ: What is the difference between qualitative and quantitative observations? Section 1 Scientific Method Chapter 2.

Unit 1 Chapter 2. Common SI Units SI System is set-up so it is easy to move from one unit to another.

Mr. Burkholder Ch 1 PowerPoint Notes Scientific notation is a way of expressing a value as the product of a number between 1 and 10 and a power of 10.

Significant Figures. The Basics  All nonzero digits are significant  Ex: 1.2 – 2 significant digits  Ex: has 5 significant digits  Zeroes between.

Do Now: (3 minutes) 1. What are the definitions of precision and accuracy? 2. Why are precision and accuracy important when making measurements?

1 Measurements. 2 Nature of Measurement Measurement - quantitative observation consisting of 2 parts Part 1 - number Part 2 - scale (unit) Part 2 - scale.

Measurements & Calculations Chapter 2. Nature of Measurement Measurement - quantitative observation consisting of two parts: Part 1 - number Part 2 -

Catalyst - WAY BACK WEDNESDAY! Grab a calculator on your way in! Please have your completed homework on your desk Mr. Knipmeyer wants to see if wearing.

SIGNIFICANT FIGURES. What are they?  It is important to be honest when reporting a measurement, so that it does not appear to be more accurate than the.

Metric Units and Measurement. Units of Measurement Why do we need a “standard” unit of Measurement? – Report Data that can be reproduced Base Units –

Intro to Chemistry Why Care?. Chemistry is Everywhere Data analysis Matter Structure of atom Elements Bonding States of matter Chemical reactions Reaction.

Chapter One Chemical Foundations. Section 1.1 Chemistry an Overview Macroscopic World Macroscopic World Microscopic World Microscopic World Process for.

1.3 Converting units  To convert 1,565 pennies to the dollar amount, you divide 1,565 by 100 (since there are 100 pennies in a dollar).  Converting SI.

2.3 Using Scientific Measurements. Accuracy vs. Precision  Accuracy- closeness of measurement to correct or accepted value  Precision- closeness of.

Ch. 3, Scientific Measurement. Measurement : A quantity that has a and a. Like 52 meters.

1 Data Analysis Ch 2. 2 Units of Measurement SI units SI units Base Units Base Units Derived Units Derived Units.

Catalyst – January (6 2 -(2*5), 2010  Describe the pattern you see in the first 5. After, fill in the 6 th answer. 1) 3,450,000.= 3.45 x ) 1,240,000,000.=

Measurements Description and Measurement Chapter 2:1.

Chapter 2 Measurements and Calculations. Sect. 2-1: Scientific Method Scientific Method Scientific Method ▫ Observing and collecting Data ▫ Qualitative.

Catalyst HOMEWORK OUT, PLEASE!  In complete sentences, describe the pattern you see in the first 4. After, fill in the 5 th and 6 th answers. 1) 3,450,000.0.

Chapter 2 Analyzing Data. Scientific Notation & Dimensional Analysis Scientific notation – way to write very big or very small numbers using powers of.

Catalyst January 7(5-3), 2011 HW OUT! Check out the ‘graph’ to the right. Determine who the “Biggest Rapper Alive” is and back up with at least 2 reasons.

Measurements and Calculations

Measurements and their Uncertainty

Chapter 2 Data Analysis. Units of Measurement SI (Systém Internationale) Units are the units of science Base Units Time: Second Length: Meter Mass: Kilogram.

Chapter 2 Data Analysis. Units of Measurement Metric System The system of measurement used by Scientists Base unit modified by factor of 10 English System.

Scientific Notation Significant Figures Conversion Factors.

Measurement Vocab. Measurement: a quantity that has both a number and a unit Measuring: a description of your observation.

Scientific Measurement. Using and Expressing Measurements Measurement- a quantity that has both number and unit Scientific notation- using exponents to.

Significant Figures.

Name_____________________ Block____ Chemistry - Chapter 3 Reading Measurements, Significant Figures, SI Units and Dimensional Analysis.

Chapter 2 Data Analysis. 2.1 Units of Measurement Before 1795, measurement units were inexact!!!!

Chemistry I. Precision and Accuracy Accuracy refers to the agreement of a particular value with the true value. Precision refers to the degree of agreement.

Today’s Do Now 8/11/2014  1) Five different individuals measured the volume of a sample of sulfuric acid. Their data is in the table to the right: IndividualMeasurement.

Units, Measurement, Significant Figures & Conversions Physics.

Scientific Measurement. Measurements and Their Uncertainty Measurement – quantity that has both a number and unit Measurement – quantity that has both.

Chapter 3- Measurement This powerpoint highlights what you should know and be able to do for the chapter 3 test. Reading this will NOT guarantee you an.

Chapter 2: Measurement & Problem Solving pg LO: I can use scientific notation with sig figs in mathematic calculations.

Observing, Measuring, & Calculating

Unit 1 Chapter 2 Pages

Why do we need to be able to measure things?

Catalyst – January 6(4), 2013 HOW OUT! Grab a CALCULATOR

Section 2.1 Units and Measurements

Notes Significant Figures!.

Units and Measurement International Space Station

Chapter 1 Units and Problem Solving

Scientific measurement

Metric System Based on the decimal system, the metric system is the common system used for scientific measurements.

Presentation transcript:

Catalyst January 7(5-3), 2011 HW OUT! Check out the ‘graph’ to the right. Determine who the “Biggest Rapper Alive” is and back up with at least 2 reasons (must be from graph!).

Today’s Agenda  Catalyst  Go over yesterday’s Exit Question/HW  Sig Figs  Intro to Dimensional Analysis  Work Time  Group of the Week and Exit Question Book HW: Chapter 5 Review Questions 24, 26, 39, 40

Today’s Objectives  SWBAT determine the number of significant figures in a number.  SWBAT convert units like it’s hot…by using dimensional anlaysis.

Analyze 1 of the 12 Testing Power Words!  Example: Analyze the experimental data to formulate a conclusion. Analyze how the author uses personification.  Break down  Figure out  Scrutinize  Interpret

Exit Question Describe the accuracy (A) and precision (P) of 1 & 2. What prefix/unit would you use to measure the volume of cold drink in a can? What prefix/unit would you use to measure the length of your pinky?

Pop Quiz #2 1. How many significant figures are in the number 1457? 2. Round the following number to 2 significant figures: About how many pounds are in 1 kilogram? 4. 1 dozen = 12 is an example of what two-word term?

Significant Figures  Key Point #1: Know the Sig Fig Rules starting on page 124!!! (esp. 1 & 2!!) 1. Nonzero integers always count as sig figs. Ex: 1457 has 4 sig figs 2. There are 3 class of zeroes a. Leading Zeroes (not sig figs) Ex: b. Captive Zeroes (are sig figs) Ex: c. Trailing Zeroes (sometimes sig figs) Ex: 100 vs. 100.

Counting Sig Figs: Examples  Give the number of sig figs for each of the following measurements: a b x10 2 c d e. 290.

Rounding Off Numbers  Key Point #2: Know the Rounding Rules on page 126 (esp. 1!!) 1. If the digit to be removed… a. is less than 5, the preceding digit stays the same Ex: 1.33 rounds to 1.3 b. is equal to or greater than 5, the preceding digit is increased by 1 Ex: 1.36 rounds to 1.4 Ex: 3.15 rounds to 3.2 Ex: 4.57 rounds to 4.6

Rounding: Examples  Round the following numbers to 2 sig figs: a b. 321 c d  Round the following numbers to 3 sig figs: a b c d x10 -3

CONVERSIONS  GET READY FOR AWESOME!

Convert it like it’s hot  Key Point #3: A conversion factor shows the same value with two different units.  YOU ALREADY KNOW THIS STUFF!  Examples: 10 dimes= 1 dollar 20 nickels= 1 dollar 4 quarters= 1 dollar

Dimensional Analysis  Key Point #4: Dimensional analysis is a tool used to convert from one unit to another.

Working on the Railroad  Step 1:  What to what?  Step 2:  Write conversion factor(s)  Step 3:  Train tracks

Practice! One-step problems.  How many meters are in 10 centimeters?  How many centimeters are in 327 meters?

Practice! On your own!  The distance from New Orleans to Miami is 1387 kilometers (862 miles). Convert 1387 kilometers to meters!

Exit Question  In July 2008, it was estimated that the world’s population is about 6,707,000,000. The United States’ population was estimated to be 304,060,000. The coldest temperature ever created by man is Kelvin. Write the 3 bolded numbers in scientific notation and determine the number of sig figs for each.