Significant Figures Definition: Measurement with Sig Figs:

Slides:

Advertisements

Similar presentations

Significant Figures. 1.All nonzero digits are significant. Example: 145 (3 sig figs) 2.Zeroes between two significant figures are themselves significant.

Advertisements

Significant Figures. Purpose Significant figures are used with any measurement Significant figures are used with any measurement They tell you something.

Measurements: Every measurement has UNITS.

Significant Figures Used to report all precisely known numbers + one estimated digit.

Rules for Counting Significant Figures - Details Nonzero integers always count as significant figures has 4 sig figs.

Significant Figures.

TOPIC: Significant Figures Do Now: Round 9, to the… 1.Tenths 2.Ones 3.Hundreds 4.Thousandths 5.Thousands.

IB Chem I Uncertainty in Measurement Significant Figures.

Significant Figures. Who cares? Sig Figs measure the degree of precision of a measurement.

Aim: How can we perform mathematical calculations with significant digits? Do Now: State how many sig. figs. are in each of the following: x 10.

Chapter 1.5 Uncertainty in Measurement. Exact Numbers Values that are known exactly Numbers obtained from counting The number 1 in conversions Exactly.

Working with Significant Figures. Exact Numbers Some numbers are exact, either because: We count them (there are 14 elephants) By definition (1 inch =

Measurement book reference p Accuracy  The accuracy of the measurement refers to how close the measured value is to the true or accepted value.

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

Significant Figure Notes With scientific notation too.

Significant Figures What do you write?

Significant Figures Rules and Applications. Rules for Determining Significant Figures 1.) All Non-Zero digits are Significant. 1.) All Non-Zero digits.

Chemistry 100 Significant Figures. Rules for Significant Figures  Zeros used to locate decimal points are NOT significant. e.g., 0.5 kg = 5. X 10 2 g.

Uncertainty in Measurement Accuracy, Precision, Error and Significant Figures.

Significant Figures 8/15/13. Bellwork (8/15/13)  What is a Domino?  It is a method for converting a unit of measurement into another unit of measurement.

Significant Figures.

Significant Figures “Sig Figs”

Significant Figures Used to report all precisely known numbers + one estimated digit.

Significant Figures. Significant Digits or Significant Figures We must be aware of the accuracy limits of each piece of lab equipment that we use and.

1 Significant Figures (Sig Figs) Quantity includes all known digits plus one estimated digit = last digit of # Indicates precision 500 vs

Significant Figures Homework: Working with Numbers handout # 1 – 13 Significant Figures handout #

SIGNIFICANT FIGURES Rules for Significant Figures.

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

Significant Figures Rules If the decimal is Present, then go to the Pacific side of the measurement, count the first non-zero number and count all other.

Significant Figures When we take measurements or make calculations, we do so with a certain precision. This precision is determined by the instrument we.

Significant Figures. Who cares? Sig Figs measure the degree of precision of a measurement.

Chapter 3 Section 2 precision- how close a series of measurements are to one another accuracy- the closeness of measurements to the true value of what.

Significant Figures SIGNIFICANT FIGURES You weigh something and the dial falls between 2.4 lb and 2.5 lb, so you estimate it to be 2.46 lb. The first.

Warm-Up 1) Melting bee’s wax

Rules for Significant Figures

Significant Figures!.

Unit 3 lec 2: Significant Figures

Rules for Significant Figures

Significant Figures Notes on PAGE _____. Significant Figures Notes on PAGE _____.

Math of Chem I Textbook Chapter 1 Aim:

Significant Figures Sig Figs.

Significant Figures “SIG FIGS”.

Significant Figures.

Warm –up #2 What is chemistry? Write what you recall about the definition and name 2 areas of study of chemistry.

Class Notes: Significant Figures

Aim: Why are Significant Figures Important?

Review of yesterday… How many sig figs are in the following? 0.02

Pacific-Atlantic Method

Unit 2- Measurements- Significant Figures & Scientific Notation

IV. Significant figures

Notes Significant Figures!.

Significant Figures Any digit in a measurement that is known with certainty plus one final digit, which is somewhat uncertain or estimated.

Significant Figures The numbers that count.

DETERMINING SIGNIFICANT FIGURES

Significant Figures.

Significant Figures and Scientific Notation

Unit 1 lec 3: Significant Figures

Do Now Draw and measure the object

Section 3-2 Uncertainty in Measurements

Significant Figures Be able to identify the number of significant figures that an number has.

Measurement book reference p

Objectives C-1.1 Apply established rules for significant digits, both in reading a scientific instrument and in calculating a derived quantity from measurement.

Significant Figures.

Significant Figures and Rounding

Aim: How do we determine the number of significant figures in a measurement? Warm Up What is the difference between the values of 3, 3.0, and 3.00.

Significant Figures (Sig figs)

Calculation with Significant Figures

Significant Figures.

Significant Figures.

Introduction to Significant Figures &

Presentation transcript:

Significant Figures Definition: Measurement with Sig Figs: Digits in a measurement that have meaning relative to the equipment being used. Digits that can be known precisely plus a last digit that must be estimated. Depends on the equipment being used to measure.

Significant Figures Pacific to Atlantic Rule Decimal Present Start from Pacific, every digit beginning w/ first non-zero digit is significant How many sig figs? 20.0g 0.000568cl 1000. cm

Significant Figures Decimal Absent Atlantic to Pacific Rule Decimal Absent Start from Atlantic, every digit beginning with a nonzero digit is significant. How many sig figs? 100020g 1000g 13250g

Measurement Notes – Sig Figs Calculations using Sig Figs Addition/Subtraction Example: Multiplication/ Division Example Limit and round to the least precise place 123.25mL + 46.0mL +86.257mL = Limit and round to the least # of significant figures. 23.0cm x 432cm x19cm =