Measuring Matter Metric System System of International Units

Measuring Matter

Metric System / System of International Units (SI) There are seven base units. SI term Meter Kilogram Kelvin Second Ampere Candela Mole What it Does Abbreviation for length m for mass; applied kg to weight in everyday terms temperature K time s electric current A luminous intensity cd amount of substance mol

Why use Metric It is simple: it only uses 3 base units of measure. Meter: Length Gram: mass Liter: capacity It is simple: uses a base of 10

English Units / US Customary Units

Mass A measure of how much matter is in an object. http: //www. youtube. com/watch? v=BAf 6 Ho. VK 6 JI

Weight or Mass? ~Weight is a measure of the force of gravity on you. ~On Earth, all objects are attracted downward by Earth’s Gravity. ~Other planets, the force of gravity maybe more or less. ~On Earth everyday life, weight can be useful in measuring matter of an object. ~Scientist rely on the measurement of mass rather than weight. ~Weight can change depending upon location (gravity)

Volume The amount of space that matter occupies. All forms of matter have volume. Finding volume: Volume = Length x Width x Height When you multiply the three measurements, you must multiply the units as well as the numbers. 2 x 2 x 2= 2(3) 2 cm x 2 cm = 8 cm 3

Volume cm 3 is Cubic Centimeter How can you measure the volume of an irregular shape, Put the object in a graduated cylinder containing water and measure the change in volume of the water. http: //www. youtube. com/watch? v=Ghu. DEgd. O 774

Density Substances may have the same mass but don’t fill the same volume. density is the measurement of how much mass is contained in a given volume. To calculate density: Density = Mass volume A unit of density is always a unit of mass. Units of density written: g/cm 3 or g/m. L http: //www. youtube. com/watch? v=BB-Sza. ZC-Sw