Review for PR 9 Pointers to note from your PR 9. 1. Approx focal length Check correct unit (cm) You used a metre rule to measure, so it should be given.

Slides:

Advertisements

Similar presentations

Errors and uncertainties in chemistry internal assessment

Advertisements

Measurements and Their Uncertainty 3.1

Significant Figures Physical Science.

Physics Tools and Standards

COMMENTS FOR PR 4 FOCUSING ON PRACTICAL SKILLS. RECORD OF MEASUREMENTS & CALCULATIONS I/AV/VV/I / Ω (2 s.f.) (2 s.f.)(3 s.f.)(2.

Use the instrument precision. Instrument precision is defined as the ‘smallest non-zero reading measured by the instrument’, and refers to the actual.

GRAPHING & BASIC TRIG REVIEW AUGUST ANALYZING GRAPHS AND TABLES In groups of 2-3, examine a graph. Can you understand exactly what data is.

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 Every measurement has a limit on its accuracy based on the properties of the instrument used. we must indicate the precision of the.

Unwrapping the Unit Circle. Essential Question: What are the graphs of the sine and cosine functions? Enduring Understanding: Know the characteristics.

Precision in Measurements

Significant Figures Part II: Calculations.

{ Significant Figures Precision in Measurements.  When you make a measurement in a laboratory, there is always some uncertainty that comes with that.

Higher Biology Unit 1: Cell biology Unit 2: Genetics & Adaptations

Accuracy: The closeness of a measurement to the true or actual value

Scientific Notation And Significant Figures.

Uncertainty and error Distinguish between precision and accuracy Accuracy is how close to the “correct” value Precision is being able to.

Physics Basics First Week of School Stuff Sig. Figs, Dimensional Analysis, Graphing Rules, Techniques, and Interpretation.

PHYSICS WORKSHOP Demystifying 9188/4 Yours truly T.V Madziva or

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? There are 2 kinds of numbers: 1. Exact : Known with certainty. Example: the number of students in this.

Significant Figures Chemistry. Exact vs approximate There are 2 kinds of numbers: 1.Exact: the amount of money in your account. Known with certainty.

Graphing Exercise. In this exercise you are going to make as many dots as you can on your whiteboard in a chosen amount of time. You will then graph your.

IB Mark Schemes Data Collection and Processing Honors Physical Science 2012.

MEASUREMENTS. What is the difference between these two measurement rulers? Should we record the same number for each scale reading? The second scale gives.

Significant Figures When using calculators we must determine the correct answer. Calculators are ignorant boxes of switches and don’t know the correct.

Significant Figures. What is a significant figure? The precision of measurements are indicated based on the number of digits reported. Significant figures.

Significant Figures Chemistry 10 Chemistry 10 Significant figures: the number of digits in an experimentally derived number that give useful information.

Data Analysis & Presentation How We Use and Communicate Data.

GRAPHING NOTES Part 1. TYPES OF GRAPHS Graphs are used to illustrate what happens during an experiment. Bar graph - used for comparing data. Pie graph.

Measuring Keeping track of precision. Two Types of numbers The two types are exact and measured. Exact numbers are arrived at through counting. Example:

Data  Qualitative (don’t forget this in all labs) non-numerical information obtained from observations, not from measurement  Quantitative numerical.

Measurement and Data Processing Topic 11.1 & 11.2 (not 11.3)

measurement, error, and sig figs

All measurements are subject to uncertainties. All instruments used are influenced by external circumstances, and the accuracy of a measurement may be.

Accuracy vs. Precision. Calculations Involving Measured Quantities The accuracy of a measured quantity is based on the measurement tool. The last digit.

Maths Skills. Uncertainties Use the smallest readable unit of instrument. Measuring length on a ruler eg. 1mm on ruler, uncertainty is mm.

Graphing Data: Information Data Table: a way to organize data in columns so it is neat and readable Title: a brief way to describe the content of a book,

Graphical Analysis I Graphing Experimental Data. As a barge is loaded with more cargo Weight, the Depth that it sinks into the water changes. The table.

3.1 Measurements and Their Uncertainty Using and Expressing Measurements - A measurement is a quantity that has both a number and a unit. Scientific Notation.

Significant Figures Measure the length of your hand in cm.

Part 2 Significant Figures with Calculations

Topic 11 Measurement and data processing

Precision in Measurements

BELLWORK 9/13/16 1 Tm = 1012 m 1mm = 10-3 m 1Mm = 106 m

What is a significant figure?

IB Mark Schemes Analysis (formerly Data Collection and Processing)

Uncertainty in Measurement

Physics Section 1- Measurements

Physics Basics First Week of School Stuff

BELLWORK 9/01/17 Complete #’s 1, 12, 22, and 34 in the new Virginia Bellwork Packet.

Uncertainty & Graphs PowerPoint

Measurement and uncertainties

Review of Essential Skills:

BELLWORK 9/2/15 How does a scientist reduce the frequency of human error and minimize a lack of accuracy? A. Take repeated measurements B. Use the same.

Accuracy, Precision, Percent Error, Significant Figures and Rounding

Physics Basics First Week of School Stuff

Physics Basics First Week of School Stuff

Topic 11: Measurement and Data Processing

Task Will involve the energy transfers involved when a

Physics Basics First Week of School Stuff

SPA Physics Theory Lesson

Rounding Significant Figures (1 mark)

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 Digits.

Stage 3: Growing our own ingredients

Using Scientific Measurements

Presentation transcript:

Review for PR 9 Pointers to note from your PR 9

1. Approx focal length Check correct unit (cm) You used a metre rule to measure, so it should be given to 1 decimal place!

2. Table of data Units – Remember that x, y, h 0, h i are all in cm – Magnification, m, does not have units (X is not a unit for magnification!!) Measured data – Data you obtain from measurements must be recorded to the appropriate decimal place based on the instrument used.

2. Table of data – In this experiment, y/cm, x/cm, h 0 /cm and h i /cm are all measured values. They must all be recorded to 1 decimal place. Calculated value – The only calculated value for this experiment is m! – m must follow the least number of s.f. of values used to calculate it.

Example of table y/ cmx/ cmh 0 / cmh i / cmm

Example of table y/ cmx/ cmh 0 / cmh i / cmm s.f. This should be 2 s.f.

Example of table y/ cmx/ cmh 0 / cmh i / cmm

Example of table y/ cmx/ cmh 0 / cmh i / cmm s. f. 2 s.f. This should be 1 s.f.

Example of table y/ cmx/ cmh 0 / cmh i / cmm

Example of table y/ cmx/ cmh 0 / cmh i / cmm The number of sig fig is dependent on those particular values used to calculate that one specific value of m.

3. Graph S – Scale (data points need to cover at least 5 big squares horizontally and 6 big squares vertically) P – Points are correctly plotted to get this point L – A good best fit line is drawn (also depends on whether the line is neat) A – Label axes properly!

3. Graph C – Choose points OTHER THAN your own data points. – Write coordinates to the precision of the graph paper (don’t round up to 3 s.f.!! Leave it to the most precise value you can determine in the graph) T – Triangle has to be big enough! – Use dotted lines!

Example of Graph First data point Last data point These points must be more than 5 big squares apart Similarly for vertical, the first and last data points must be more than 6 big squares apart

4. Precaution Must have two parts: – Action taken – How it helps to make your results better – Which particular reading does it improve Example: – Switch off the lights so that the image formed will be clearer and thus, the determination of x will be more accurate.

5. Sources of error Must have 2 parts – Describe the difficulty you faced in the experiment – State which measurement it affects (measurement of x, y, or h) Example 1: – It is difficult to determine when the sharpest image is formed. The image remains focused over a range of x values. Therefore, the error in the measurement of x values is significant.

5. Sources of error Example 2: – The precision of the ruler is only 0.1 cm, but the smallest h i reading required to be measured is 0.4 cm. The percentage of uncertainty is about 25%. Thus, the precision of the ruler causes a significant source of error.

Bear these points in mind for Practicals next year! Study hard for EOY! Check your marks on SDMS!