# Cornell Notes Paper ```Cornell Notes Paper
Topic: Measuring Matter
Date: 10/29/14
Source: ItC, 1.3, 14-19
Main Topics
Detailed Notes
What units are used to
express mass and volume?
 Weight – a measure of the force of gravity on an object
(unit used his newtons)
o weight changes based on the planet – different
gravitational pull equals different weight
 mass – the amount of matter in an object
o mass doesn't change wherever you are – the
amount of matter in an object remains constant
o mass is measured in kilograms (kg) – grams are
used for smaller measures – there are 1000 g in a
kilogram
 volume – the amount of space matter occupies – all
matter takes up space – solids, liquids, and gases
o liquid volume is measured in Litres (L)
o smaller liquid volumes are measured in milliliters
(mL)
o solid volume is measured in cubic centimeters
(cm3)
o 1 mL = 1 cm&sup3;
 finding the volume of a rectangular object uses the
formula: length x width x height
 finding the volume of an irregular object – submerge
the object in a graduated cylinder – liquid level will rise
by an amount equal to the volume of the object in
milliliters
How is density determined?
 Density – the measure of the mass in a given volume
 expressed as the number of grams in 1 cm&sup3; (g/cm3)
o density of water is 1 g/cm&sup3; – can also be
expressed as 1 g/mL
 KEY CONCEPT – density of material can be found by
dividing its mass by its volume
o density = mass/volume
 objects with density greater than water will sink – if
they have less density than water, they will float
Cornell Notes Paper
Topic: Measuring Matter
Date: 10/29/14
Source: ItC, 1.3, 14-19
Main Topics
Detailed Notes
Using density
 If you know the density of a substance you can use it to
identify an unknown substance
 measure the mass and volume of the substance that
you don't know – if the densities match, you have the
same substance. If they differ, they are different
substances.
Cornell Notes Paper
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