What is Density?. Density is… The ratio of the MASS of a substance to it’s VOLUME.
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Transcript of What is Density?. Density is… The ratio of the MASS of a substance to it’s VOLUME.
What is Density?What is Density?
Density is…Density is…
The ratio of the The ratio of the
MASS MASS
of a substance of a substance to it’s to it’s
VOLUMEVOLUME
Mass Is…Mass Is…
A measure of A measure of how much how much matter is in matter is in an objectan object
How is Mass Measured?How is Mass Measured?
Use a balanceMeasured in grams (g)
Volume is…Volume is…
The amount of The amount of space that space that matter matter occupies.occupies.
ll x x ww x x hh = = volumevolume
Volume is…Volume is…
Measured in the Measured in the metric unitmetric unit
cubic centimeter cubic centimeter
oror
centimeter cubedcentimeter cubed
or or
(cm(cm33))
1 cm3 = 1 ml
8 cm3 = 8 ml
15 ml = 15 cm3
VolumeVolume
A liquid is A liquid is measured using measured using a graduate a graduate
cylinder.cylinder.
Liquids are Liquids are measures in measures in
milliliters (ml)milliliters (ml)
The Formula for DensityThe Formula for Density
Density = Mass (g) / Volume (cmDensity = Mass (g) / Volume (cm33))
What else do I need to What else do I need to know?know?
Density of Water is Density of Water is 1 g / cm1 g / cm33
When does something Float?When does something Float?
When it’s density is less than 1 g/cmWhen it’s density is less than 1 g/cm33
When does something sink?When does something sink?
When it’s density is more than 1 g/cmWhen it’s density is more than 1 g/cm33
Measuring Density…Measuring Density…
Regular Regular shaped shaped objecrtsobjecrts
l x w x h = l x w x h = cmcm33
Measuring Density…Measuring Density…
IRREGULAR Shaped ObjectsIRREGULAR Shaped Objects““displacement Method”displacement Method”
1.1. Fill a graduate cylinder to a whole Fill a graduate cylinder to a whole ##
2.2. Carefully drop object into the Carefully drop object into the graduategraduate
3.3. Subtract the differenceSubtract the difference
cmcm33 = volume = volume