You will have You will have 44 minutes to answer minutes to answer the questions on the questions on

the next slidethe next slide

Bellringer 9-17-09Bellringer 9-17-09

A gram is about the mass of one _____A gram is about the mass of one _____A big bottle of Coke is about 2 ______A big bottle of Coke is about 2 ______

We measure length using a ____ We measure length using a ____ To find the mass of a car we would use To find the mass of a car we would use

____________To find the height of a doorway we would To find the height of a doorway we would

use _____use _____To find the amount of water in a fish tank To find the amount of water in a fish tank

we would use _____we would use _____

Cornell NotesCornell NotesWe will be

taking all our notes in Biology

in the Cornell notetaking

format

MetricsMetrics

Metric SystemMetric System

Scientific Scientific MeasurementsMeasurements

Metric SystemMetric System

Used by almost every country in the Used by almost every country in the world, with the notable exception of world, with the notable exception of the USA.the USA.

Especially used by scientists.Especially used by scientists. Abbreviated SI, which is French for Abbreviated SI, which is French for

System International.System International.

Metric prefixesMetric prefixes Kilo- (k)Kilo- (k)

Hecto- (h)Hecto- (h) Deca- (dk)Deca- (dk) Meter or Liter or Gram Meter or Liter or Gram

(m, l, g)(m, l, g)

Deci- (d)Deci- (d) Centi- (c)Centi- (c) Milli- (m)Milli- (m)

Up to bigger units of

measurement

Down to smaller units

of measurement

Metric prefixesMetric prefixes

KKiloilo KKinging HHectoecto HHenryenry DDecaeca DDiedied MMeter or Liter or Grameter or Liter or Gram MMondayonday DDecieci DDrinkingrinking CCenti enti CChocolatehocolate MMiliili MMilkilk

Metric PrefixesMetric Prefixes

Common prefixes are:Common prefixes are:

kilo = 1000kilo = 1000

centi = 1/100centi = 1/100thth

milli = 1/1000milli = 1/1000thth

1 meter = 100 centimeters= 1000 1 meter = 100 centimeters= 1000 millimetersmillimeters

No Naked NumbersNo Naked Numbers

MeterMeter Used to measure Used to measure

lengthlength (distance (distance between two between two points.)points.)

We We use meter use meter stickssticks to to findfind the the lengthlength of of objects.objects.

GramGram

Used to measure massUsed to measure mass (the amount (the amount of matter that makes up an object)of matter that makes up an object)

A golf ball and a ping pong ball are A golf ball and a ping pong ball are the same size, but the golf ball has the same size, but the golf ball has a lot more matter in it. So the golf a lot more matter in it. So the golf ball will have more mass.ball will have more mass.

A A largelarge paper clippaper clip has a mass of has a mass of about about one gram.one gram.

GramGram We will use a We will use a triple beam balancetriple beam balance

scale or a scale or a electronic scaleelectronic scale to measure to measure mass.mass.

LiterLiter Used to measure Used to measure

volumevolume _ the _ the amount of space amount of space contained in an contained in an object. (object. (liquid liquid and gasand gas))

We We measuremeasure volume volume with awith a graduated graduated cylindercylinder..

Other measurementsOther measurements

TemperatureTemperature is is measured by a measured by a thermometer in degrees Celsius (thermometer in degrees Celsius (oo C) C)

Time – is measured by seconds, Time – is measured by seconds, hours, days, centuries, etc.hours, days, centuries, etc.

Graduated CylindersGraduated Cylinders

Liquids form Liquids form curved, upper curved, upper surfaces when surfaces when poured into poured into graduated cylindersgraduated cylinders

To correctly read To correctly read the volume, read the volume, read the bottom of the the bottom of the curve called thecurve called the meniscusmeniscus

Laboratory EquipmentLaboratory Equipment

Test TubeTest Tube

Erlenmeyer Erlenmeyer FlaskFlask

Graduated CylinderGraduated Cylinder

BeakerBeaker

Electronic scaleElectronic scale

Meter StickMeter Stick

ThermometerThermometer

Safety glassesSafety glasses

GlovesGloves