Presentation on theme: "Density All substances have different densities, therefore, you can identify a substance if you know its density The formula to calculate something’s density."— Presentation transcript:
1 DensityAll substances have different densities, therefore, you can identify a substance if you know its densityThe formula to calculate something’s density is:When we calculate density, the units we use are either g/mL or g/cm3. How do we know which set of units to use?MDV
2 g/ml - liquids g/cm3 for solids volume of liquids are measured in millilitersg/cm3 for solidsVolume of solids are measured in cm3
3 Mass To find mass, we put the object on a balance Mass is always in gramsHow do we find volume?
4 Volume - two options Liquids Solids Use a graduated cylinder to find the volume in mLSolidsIf possible, measure length, width, and height; then multiply to get your volume in cm3If not, use displacement of water to measure volume (you will need to convert to cm3 when you are done because it is a solid)
5 Measuring Solid Volume 10 cm9 cm8 cmWe can measure the volume of regular object using the formula length x width x height._____ X _____ X _____ = _____We can measure the volume of irregular object using water displacement.Amount of H2O with object = ______ About of H2O without object = ______ Difference = Volume = ______