Measuring MatterWhich weighs more, a pound of feathers, or a pound of bricks?

Weight or Mass?Weight is a measure of the force of gravity on you

Mass is measurement of how much matter is in an objectAn objects weight changes from Earth to the moon or other planets, but the mass stays the same. REASON?Weight is a measure of the force of gravity on you, on the moon, gravity is much weaker.

Measuring MassUses International System of Units (SI)

kg = kilogram is a unit of massg = gram1000 g = 1 kgExamples:

Nickel = 5 gbaseball = 150 g glass of water =200g

Measuring Volume

Volume is the amount of space that matter occupies

Regular objects Volume = length x width x heightA rectangle has a length= 9 cmheight= 5 cmwidth= 4.2 cm

Then, 9 x 5 x 4.2 =189 cm3 (cubic centimeters)LHW

Measuring VolumeIrregular ObjectsUse water displacement with a graduated cylinderOdd shaped objects like: ball, egg, rockSTEPS:Fill graduated cylinder with water

Measure mL of water at the meniscus and write down amount

Place irregular object in graduated cylinder

Measure mL of water at the meniscus againFind the difference between the 2 water levels by subtraction Record the answer in volume mL

Other units of measurementMeasuring liquidsliter (L)milliliter (mL)1000 mL = 1 LMeasuring Distanceskilometer (km)meter (m)centimeter (cm)millimeter (mm)10mm = 1 cm100cm = 1 m1000m = 1 km

DensityDensity is the measurement of how much mass is contained in a given substanceDensity = mass divided by volumeThings that float on water are less dense than water. Less dense in water = floatThings that sink in water are more dense than water. More dense in water = sink

Things that neither float or sink, stay level, have the same density Same density = level

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