You will need a pencil and colored pencils or highlighters for today's chemistry lesson. The lesson will cover measurements and dealing with data, including the metric system units of liters, meters, and grams. Key concepts are that measurements must include units, and the acceptable measurement system is the International System of Units (SI) or metric system. Measurements have limitations related to tools, carelessness, and how close they are to the true or accepted value in terms of accuracy and precision.

1. Today in ChemistryYou will Need:PencilColored Pencils or HighlightersPower Notes – Measurements and Dealing w/Data – Book shelf – 2 pages 3 sidesCornell Notes Parts 1 & 2 – Due Today

2. Assignment Log #1

3. Incremental amounts used to measure something

4. In science, you must ALWAYS LABEL your numbers with the UNITS you are using.Length Meter mProperty, Unit and SymbolMass Gram gVolume Cubic Unit, Liter l or u3Temp Celsius, Kelvin C or KAmount of Sub mole molin Solution Time Second sLight Intensity Candela cdElectrical Current ampere A

5. The acceptable measurement system in chemistry is the INTERNATIONAL SYSTEM of MEASURMENT. Communicate EffectivelyKnown as the SI or Metric System

6. Basic Three Units in the Metric System are: LITER, METER, GRAM

7. Change the size of the base measurementWhat do Prefixes do to the basic 3 unitsExample: millimeterMilli = Prefix = 1000thMeter = base unitAbsolute Zero (particles stop moving)Zero KelvinBose Einstein Condensates or BEC’s have been cooled to this state

8. To convert from Celsius to Kelvin ADD 273 to any Celsius temp.Celsius

9. Concerned w/measurements that analyze quantities (amounts of matter)Quantitative ScienceIs there a “perfect” measurement?Limitations always exist due to:

10. Tools

11. Carelessness of the person making the measurements.

12. How close to the “true” or accepted (correct) valueAccuracyHow close together a group of measurements are to each other – reproducible dataPrecisionIn chemistry: the significant # we will round to – 2 places to the right of the decimal – (nearest 100th)Estimation Digit

13. Collecting DatamLVolume Volume mLVolume mLVolume cm3DistancecmMassgMassgTimesTemperatureC, KComputer Models

14. GraphsAnalysis of DataA factorin an exp. that can be tested or changed to affect the outcome of the experiment.The factor that is changed by the scientist

15. e.g. : Months, Times, Types of WeatherIndependent VariableDependent VariableThe factor that changes because of the independent variable

16. e.g.: # of births, cars that pass by, # of occurring weather types Y axisDependent VariableX axisIndependent variable

17. Identifying PatternsDirect relationship = both changes in the variables are in the same directions

18. Identifying PatternsDirect relationship = both changes in the variables are in the same directions100Volume00100Temp

19. Identifying PatternsIndirect relationship = two variable change in opposite directionsDirect relationship = both changes in the variables are in the same directions100Volume00100Temp

20. Identifying PatternsDirect relationship = both changes in the variables are in the same directionsIndirect relationship = two variable change in opposite directions100100VolumeVolume001000Temp100Pressure0

21. ReviewUse your Power Notes to complete the 15 question review.Do NOT use complete sentencesJust give the answer.Due Tomorrow