Measuring. Accuracy v. Precision pg. 8 Precision - how closely the measurements match each other. Instruments that measure using more decimals are more.

Slides:

Advertisements

Similar presentations

Mass is the amount of matter (“stuff”) in an object.

Advertisements

Chapter 2 – Scientific Measurement

Reading a Graduated Cylinder And All about the Meniscus.

Reading the Graduated Cylinder And All about the Meniscus.

Starter The radius of the moon is 1,737,000 meters. Write this in scientific notation. The diameter of a carbon atom is meters. Write.

Errors in Measurements Class measurements for the density of gold (in g/mL) Group 117.8Group Group 218.0Group Group 317.9Group

CW 5: PRECISE Scientific Measurement Assn. 8. Every scientific measurement must include ALL the certain digits plus the first uncertain digit in the last.

Measurement vs. Number Significant Digits and Accuracy Exact numbers – number determined by counting or definition Approximate numbers – number determined.

Measurements: Precision, Accuracy and Uncertainty

With a graduated cylinder

T. Trimpe Lesson 3: Volume T. Trimpe

MEASUREMENT IN SCIENCE Making our efforts worthwhile.

Making Measurements and Using Numbers The guide to lab calculations.

Accuracy vs. Precision Some people would say that Trial 2 would be more accurate than Trial 1 But Accuracy is how close our measurement is to the actual.

Darn. Wednesday, Oct. 2 nd : “A” Day Thursday, Oct. 3 rd : “B” Day Agenda  Homework questions/collect (pg. 53: #1-7)  Sec. 2.2 quiz: “Studying Matter.

Homework: Due Friday 9/4 Do 1-10 on a separate sheet of paper, include units. Do all problems on slide 25 as well.

Measurements and Calculations 1. To show how very large or very small numbers can be expressed in scientific notation 2. To learn the English, metric,

Chapter 2 “Scientific Measurement” Standards for Measurement Accuracy vs. Precision Significant Figures.

Significant Figures and Scientific Notation Math in the Science Classroom.

Using Scientific Measurements. Uncertainty in Measurements All measurements have uncertainty. 1.Measurements involve estimation by the person making the.

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

Scientific Measurement SWBAT: Use scientific notation to show large & small numbers Describe the difference in Accuracy and Precision.

MEASUREMENTS. EXACT NUMBERS! Numbers determined by counting or by definition Ex: 6 apples, 1 teacher 1 inch=2.54 cm.

The Nature of Science and Technology

Measuring. Accuracy v. Precision pg. 8 Precision - how closely the measurements match each other. Instruments that measure using more decimals are more.

Math and Measurement. Significant Figures Significant Zeros 1.Leading zeros are never significant 2.Trailing zeros only count if there’s a decimal point.

Using a Graduated Cylinder Uses: 1.To measure the volume of liquids very accurately 2. To find the volume of solid objects that do not have regular dimensions.

Important Information! When liquids are poured into a graduated cylinder they will not form a straight line. They will instead form a curved line that.

/ 10 Place Value ANALYZE the following number: 3, a.What number is in the hundreds place?? b.What number is in the hundredths place?

VOLUME Volume Definition: The amount of space an object takes up. Tools/Instruments for volume: –Liquid volume: Graduated Cylinder –Solid volume: Ruler.

Significance in Measurement How to make a measurement from an instrument… How to make a measurement from an instrument… Write down all the digits that.

 Read at Eye Level  Reading: all certain digits, plus one “uncertain” or estimated digit.

Make Room for Volume Modified from T. Trimpe 2008

Measuring Volume and Finding the Volume of Irregular Solids.

Science Notebook All those details you need to know in order to do science.

Volume The amount of space an object takes up. Volume When measuring volume in liquid, Scientist use a unit known as the: mL Unit of measurement in liquids-mL.

P 251 Laboratory Activity 1 Measurement.

Chapter 1 Chemical Foundations. Section 1.4 Uncertainty in Measurement 2 Return to TOC Copyright © Cengage Learning. All rights reserved Precision and.

CH. 1 - MEASUREMENT I. Units of Measurement. Scientific Method.

Chapter 3. Measurement Measurement-A quantity that has both a number and a unit. EX: 12.0 feet In Chemistry the use of very large or very small numbers.

Reading the Graduated Cylinder

Accuracy and Precision Difference between accuracy and precision Accuracy- how close you are to the actual answer Accuracy- how close you are to the.

How many significant digits? 5700 A.1 B.2 C.3 D.4.

Volume: The measurement of the amount of space an object occupies. 1. Regular Objects Units = cm 3 2. Liquids Units = mL 3. Irregular Objects Units = mL.

Chapter 3 Lessons 1 and 2 Vocabulary Quiz. Measure of the force of gravity acting on an object. weight.

I. Using Measurements (p )

Measurements: Precision, Accuracy and Uncertainty.

Scientific Method & Measurement Unit

ml ml ) Measure the volume of liquid in a graduated cylinder. – make sure you read the measurement at the bottom of the meniscus 3 m.

Data Analysis Applying Mathematical Concepts to Chemistry.

UNITS OF MEASURE Volume. The amount of space an object occupies. The standard unit is the liter (L). One liter is equal to one cubic deciliter.

Significant Figures. Why use significant figures? Click on the graphic to read a story that shows the importance of understanding significant figures.

Making Measurements. SI system HW 1. A) g b) m. mm c) m 3 d) K e) m/s 2. A) 2g/cm 3 b) 25 kgm/s 2 (N) c. 13 m/s 2 3. A) mg b) 4.5 cm c) s.

Chapter 1 Significant Figures.

How big is the beetle? Measure between the head and the tail!

Learning Targets I can use correct numbers of significant figures and units in both measurements and calculations. I can accurately measure mass and volume.

Volume: The measurement of the amount of space a object occupies.

OPENING ROUTINE A material will float on the surface of a liquid if the material has a density less than that of the liquid. Given that the density of.

Measuring Tools Measurement Tools Units Length Mass Volume Temperature

Do Now & Announcements Grab a Handout (for after the quiz)

Scientific Measurements

Dimensional Analysis.

Measurement in Chemistry

Using Scientific Measurements

Chem Separation Challenge Write-Up due Mon 9/10 Unit 1 Test FRI 9/14.

Volume: The measurement of the amount of space an object occupies.

PG 7 of your Science Notebook

Using Scientific Measurements

Volume Notes 8/27/19.

Presentation transcript:

Measuring

Accuracy v. Precision pg. 8 Precision - how closely the measurements match each other. Instruments that measure using more decimals are more precise. Accuracy – how closely the measurement matches the true or accepted value.

Accurate Precise

Accurate Precise

Accurate Precise

Accurate Precise

Accurate Precise

How To Read Scientific Instruments 1) Record the _______ digit on the instrument. 2) Then _______________ the last digit.

How to Count Significant Figures 1.Count all of the digits you are sure of. 2.Add the last digit you estimate.

Percent Error When quantities have accepted or true values, we can calculate the percent error between our measurement of the value and the accepted value with the formula

How to Read a Graduated Cylinder Sit the graduated cylinder on a level surface. Lower your eyes to the level of the liquid (called the meniscus). Take your reading from the bottom of the meniscus. Count all of the digits you are sure of. Add the last digit that you estimate.

Quiz Number your paper 1 to 15.

1) Measuring Length A.2 cm B.19 cm C.1.95 cm D cm

2) Measuring Length A.10cm B.1.1cm C.1.05cm D.1.526cm

3) Measuring Length A.17 cm B.17.5 cm C.18.0 cm D cm

4) Measuring Length A.4cm B.4.3cm C.4.30cm D cm

5) Measuring Length A.12 cm B.12.0 cm C.12.7 cm D cm

6) Measuring Liquids The meniscus is the curve in the upper surface of a liquid close to the surface of the container or another object, caused by surface tension. It can be either convex or concave. surface tensionconvex or concave Is this meniscus convex or concave? 6) _________________ For questions 7 to 12, measure the amount of liquid in each graduated cylinder by reading the bottom of the meniscus.

7) Measuring Liquid Volume A.10ml B.10.3ml C.11.5ml D.13.0ml

8) Measuring Liquid Volume A.266 ml B.287 ml C.290 ml D.294 ml

9) Measuring Liquid Volume A.52 ml B.53 ml C.54.5 ml D.52.8 ml

10) Measuring Liquid Volume A.80 ml B.80.0 ml C.81.0 ml D.79.0 ml

11) Measuring Liquid Volume A.2.8 ml B.2.80 ml C.2.90 ml D.2.9 ml

12) Measuring Liquid Volume A.4.90 ml B.4.80 ml C.5.0 ml D ml

13) Measuring Solids A g B.26.57g C D.526.6g

14) Measuring Solids A g B g C g D.373.3g

15) Measuring Solids A g B g C.221.5g D.221.0g