Salinity Pre LabSalinity Pre LabWe got to know the stuff before We got to know the stuff before

we do it!we do it!

DO NOW:DO NOW:

You need to sit quietly and get You need to sit quietly and get ready for your brain check!ready for your brain check!

MassMass Who REMEMBERS?Who REMEMBERS?

The amount of matter in an objectThe amount of matter in an object

Tool – balance Tool – balance

Standard unit – Grams (g)Standard unit – Grams (g)

VolumeVolume Who REMEMBERS?Who REMEMBERS?

The amount of space an object takes upThe amount of space an object takes up

Tool – graduated cylinderTool – graduated cylinder

oror

Ruler (LxWxH) Ruler (LxWxH)

Standard unit Standard unit

Cylinder: Liter (L… or mL)Cylinder: Liter (L… or mL)

Ruler: Meter (MRuler: Meter (M33… or cm… or cm33))

DensityDensity Who REMEMBERS?Who REMEMBERS?

the amount of matter in a given space the amount of matter in a given space (D = M/V)(D = M/V)

Tool – balance and graduated cylinder Tool – balance and graduated cylinder

Unit: g/mLUnit: g/mL

Put it all together…Put it all together…

Standard unit for MASS: gStandard unit for MASS: g Standard unit for VOLUME: cmStandard unit for VOLUME: cm33 or mL or mL

Standard unit for Denisity…Standard unit for Denisity…

g/cm g/cm 33 OR g/mL OR g/mL

Using a ruler Using a Cylinder

SalinitySalinity Who REMEMBERS?Who REMEMBERS?

The amount of salt dissolved in waterThe amount of salt dissolved in water

DENSITY SALT LABDENSITY SALT LAB

MEASURE THE MASS OF THE BEAKER MEASURE THE MASS OF THE BEAKER WHAT IS THE MASS OF EMPTY WHAT IS THE MASS OF EMPTY BEAKERBEAKER

Mass of beaker with water 125gMass of beaker with water 125g

Mass of empty beaker - Mass of empty beaker - 25g25g

Mass of just the water 100gMass of just the water 100g