Today in ChemistryYou will need:

1.Pencil or Pen2.Colored Pencils3.Power Notes: Measurements and Dealing with Data – Bookshelf, 2 pages 3 sides, Please staple4.Log #1 – Update on-line5.Tools of the Trade (3pages 5 sides –PLEASE STAPLE – Due Today

Assignment Log #1Check

OffDate

GivenDate Due

Name of Assignment Possible Pts.

Earned Pts.

8/30 9/4 Tools of the Trade 125/10

9/4 9/5 Measurements and Dealing with Data

110

Update Log with Graded Paper Scores

Power Notes – Measurements & Dealing w/Data

Topic Name____________________ Class

PeriodDate

Units Incremental amounts used for measuring size, distance, mass, etc.

In Science you must always LABEL your numbers with the UNITS you are using.

Length meter m

Mass gram g

Volume liter, cubic unit L or u3

Temp Celsius, Kelvin C , K

Amount of Substance Mole mol in Solution

Time Second s

Luminous Intensity candela cd(brightness)

Electrical Current ampere A

In order to communicate effectively scientists around the world need to speak the same math language. This is the acceptable measurement system in chemistry.

Are added to the base unit (gram, meter, liter) CHANGE THE SIZE of the base measurement

Is called ABSOLUTE ZERO. This is the temperature at which particles would actually stop moving. A type of matter known as BOSE EINSTEIN CONDENSATES or BEC’s, have been cooled to this state.

Is the metric temperature we will be using in chemistry. To convert Celsius to Kelvin you just ADD 274.15 to whatever Celsius temperature you measure.

Concerned with measurements which analyze amounts (quantities) of matter.

This is due to the accuracy and precision of the person making the measurements

International System of Measurements

Prefixes

Zero Kelvin

Celsius

Quantitative Science

Limitations always exist in science

A measurement that is CORRECT

A measurement that is the same every time it is taken; precise measurements can be reproduced

significant figures is the number of digits believed to be correct by the person doing the measuring. We will round to the nearest 100th this year.

Accuracy

Precision

Estimation Digit

TOOL Used to Measure Unit Label

Graduated Cylinder volume mL

Beaker volume mL

Flask volume mL

Meter Stick volume cm3

Meter Stick distance, length m

Triple Beam Balance mass g

Electronic scale mass g

Stop Watch second sec

Thermometer temp C or K

Analysis of Data -Charts -Graphs

Variable a quantity, trait, or an attribute whose value may vary over the course of an experiment.

The factor that the experimenter decides to change or control; the cause of something; input

The factor that changes because the independent variable has changed; effect; output

Independent Variable

Dependent Variable

X axisIndependent variable

Y axisDependent variable

eg: a time increases the distance of the car travels also increases

Identifying Patterns:

DIRECT relationship between variables produces a graph with an upward trend

Indirect or Inverse relationship between variables produces a graph with a downward trend

eg: as the pressure increases the size of the balloon decreased

Homework

1. Complete Power Notes- Measurement and Dealing with Data – Due Tomorrow

2. Changing Seats Tomorrow