We think you have liked this presentation. If you wish to download it, please recommend it to your friends in any social system. Share buttons are a little bit lower. Thank you!
Presentation is loading. Please wait.
Published byJackson Medina
Modified over 3 years ago
Significant Figures Physical Science
What is a significant figure?There are 2 kinds of numbers: Exact: the amount of money in your account. Known with certainty.
What is a significant figure?Approximate: weight, height—anything MEASURED. No measurement is perfect.
When to use Significant figuresWhen a measurement is recorded only those digits that are dependable are written down.
When to use Significant figuresIf you measured the width of a paper with your ruler you might record 21.7cm. To a mathematician 21.70, or is the same.
But, to a scientist 21.7cm and 21.70cm is NOT the same21.700cm to a scientist means the measurement is accurate to within one thousandth of a cm.
But, to a scientist 21.7cm and 21.70cm is NOT the sameIf you used an ordinary ruler, the smallest marking is the mm, so your measurement has to be recorded as 21.7cm.
How do I know how many Sig Figs?Rule: All digits are significant starting with the first non-zero digit on the left.
How do I know how many Sig Figs?Exception to rule: In whole numbers that end in zero, the zeros at the end are not significant.
How many sig figs? 7 40 0.5 7 x 105 7,000,000 1
How do I know how many Sig Figs?2nd Exception to rule: If zeros are sandwiched between non-zero digits, the zeros become significant.
How do I know how many Sig Figs?3rd Exception to rule: If zeros are at the end of a number that has a decimal, the zeros are significant.
How do I know how many Sig Figs?3rd Exception to rule: These zeros are showing how accurate the measurement or calculation are.
How many sig figs here? 1.2 2100 56.76 4.00 0.0792 7,083,000,000 2 4 3
How many sig figs here? 3401 2100 2100.0 5.00 8,000,050,000 4 2 5 3 6
What about calculations with sig figs?Rule: When adding or subtracting measured numbers, the answer can have no more places after the decimal than the LEAST of the measured numbers.
Add/Subtract examples2.45cm + 1.2cm = 3.65cm, Round off to = 3.7cm 7.432cm + 2cm = round to 9cm
Multiplication and DivisionRule: When multiplying or dividing, the result can have no more significant figures than the least reliable measurement.
A couple of examples 75.8cm x 9.6cm = ?56.78 cm x 2.45cm = cm2 Round to 139cm2 75.8cm x 9.6cm = ?
Have Fun Measuring and Happy Calculating!The End Have Fun Measuring and Happy Calculating!
Chapter 1 Lesson4. Physical Science There are 2 kinds of numbers: ◦ Exact: the amount of money in your account. Known with certainty.
There are 2 kinds of numbers: Exact: the amount of money in your account. Known with certainty. Approximate: weight, height— anything MEASURED.
Significant Figures. What is a significant figure? There are 2 kinds of numbers: Exact: the amount of money in your account. Known with certainty.
Significant Figures Physical Science. What is a significant figure? There are 2 kinds of numbers: –Exact: the amount of money in your account. Known with.
Significant Figures. What is a significant figure? The precision of measurements are indicated based on the number of digits reported. Significant figures.
“A man with a watch knows what time it is. A man with two watches is never sure” (Unknown)
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 Figures. What is a significant figure? There are 2 kinds of numbers: 1. Exact : Known with certainty. Example: the number of students in this.
Significant Figures All IB calculations must report answer to correct # of sig fig’s. All lab measurements must be reported to correct sig fig’s and correct.
Significant Figures Chemistry I. Significant Figures The numbers reported in a measurement are limited by the measuring tool Significant figures in a.
How to determine and use the proper sig. figs.
Significant Figures. What is a significant figure? There are 2 kinds of numbers: –Exact: the amount of money in your account. Known with certainty.
Significant Figures Physical Science. What is a significant figure? There are 2 kinds of numbers: –Exact: counting objects, or definitions. –Approximate:
Bell Ringer: Oct. 4, 2010: Complete the table below. Place X in the appropriate box to indicate the type of each measurement unit. Reference: Physical.
Scientific Notation & Significant Figures Scientific Notation Scientific Notation (also called Standard Form) is a special way of writing numbers that.
DIFFERENTIATE: ACCURACY AND PRECISION Three targets with three arrows each to shoot. Can you hit the bull's-eye? Both accurate and precise Precise but.
Base Units Metric System -standard, used internationally(easy to communicate through language barriers -makes conversions simpler -based on the number.
Chemistry by the numbers Units of Measurement – The Metric System Length: Mass: Volume: Temperature: Pressure: milli-centi-deci-(unit)deka-hecta-kilo-
Significant Figures. Rule 1: Nonzero numbers are always significant. Ex.) 72.3 has 3 sig figs.
Significant Figures Significant figures in a measurement includes all of the digits that are known, plus a last digit that is estimated. All measurements.
Mastery of Significant Figures, Scientific Notation and Calculations Goal: Students will demonstrate success in identifying the number of significant figures.
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)
Significant Figures… Bluefield High School 1. What is a significant digit? Significant digits is a set of internationally accepted rules for measurement.
Introduction to Physics Science 10. Measurement and Precision Measurements are always approximate Measurements are always approximate There is always.
Significant Figures and Scientific Notation. What is a Significant Figure? There are 2 kinds of numbers: Exact: the amount of money in your account.
Adding, Subtracting, Multiplying and Dividing with Sig Figs.
Significant Figures Rules and Applications. Rules for Determining Significant Figures 1.) All Non-Zero digits are Significant. 1.) All Non-Zero digits.
Significant Figures There are two kinds of numbers in the world: Exact
Significant Figures Unit 1 Presentation 3. Scientific Notation The number of atoms in 12 g of carbon: 602,200,000,000,000,000,000, x The.
Precision in Measurements
How many significant figures?
Significant Figures How to determine and use the proper sig. figs.
Significant Figures When we take measurements or make calculations, we do so with a certain precision. This precision is determined by the instrument we.
Mathematical Operations with Significant Figures Ms. McGrath Science 10.
A measured value Number and unit Example 6 ft.. Accuracy How close you measure or hit a true value or target.
Significant Figures. Rule 1: Digits other than zero are significant 96 g = 2 Sig Figs 152 g = __________ Sig Figs 61.4 g = 3 Sig Figs g = __________.
Physics Tool Kit Units (S.I. System - Meters, Kg, S) Unit Conversion Scientific Notation Accuracy and Precision Significant Figures Dimensional Analysis.
10/2/20151 Significant Figures CEC. 10/2/20152 Why we need significant figures In every measurement in a lab, there are inherent errors. No measurement.
Significant Figures PP 6a Honors Chemistry.
Calculations with Significant Figures
SIGNIFICANT FIGURES AMOLE WHAT & WHY? Refer to them as “Sig Figs” for short Used to communicate the degree of precision measured Example -
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.
Significant Figures Every measurement has a limit on its accuracy based on the properties of the instrument used. we must indicate the precision of the.
Chemistry by the numbers Units of Measurement – The Metric System Length: Mass: Volume: Temperature: Pressure: Kilo-Hecta-Deka-BaseDeci-Centi-Milli
WHAT WE HAVE LEARNED. SCIENTIFIC NOTATION 1. Move the decimal to the right of the first non-zero number. 2. Count how many places the decimal had to.
Week. Student will: scientific notation Write in scientific notation.
© 2017 SlidePlayer.com Inc. All rights reserved.