Measuring Matter 6 Beta 2014

Measuring Matter Which weighs more, a pound of feathers or a pound of sand? Which weighs more, a pound of feathers or a pound of sand? They both weigh the same, 1 pound. They both weigh the same, 1 pound.

Measuring Matter Weight Weight Is a measure of the force of gravity on you Is a measure of the force of gravity on you Mass Is the measurement of the amount of matter in an object

Measuring Matter Mass is a physical property Mass is a physical property Mass does not change with location, even when the force of gravity on an object changes Mass does not change with location, even when the force of gravity on an object changes Scientists prefer to measure matter by its mass versus its weight Scientists prefer to measure matter by its mass versus its weight

Measuring Matter Units of Mass Units of Mass When measuring the properties of matter scientists use a system call the International System of Units (SI) When measuring the properties of matter scientists use a system call the International System of Units (SI) The SI Unit of Mass is the kilogram (kg) The SI Unit of Mass is the kilogram (kg)

Measuring Matter Equating Units of Mass Equating Units of Mass 1 kg = 1000 g 1 kg = 1000 g 1 g = kg 1 g = kg

Measuring Matter Volume Volume Is the amount of space that matter occupies Is the amount of space that matter occupies Common units of volume: liter (L), milliliter (mL), and cubic centimeter (cm 3 ) Common units of volume: liter (L), milliliter (mL), and cubic centimeter (cm 3 ) Units of Volume 1 L = 1000 mL 1 mL = L 1 mL = 1 cm 3

Measuring Matter Calculating Volume Calculating Volume Volume = Length x Width x Height Volume = Length x Width x Height

Measuring Matter Density Density It relates the mass of a material in a given volume It relates the mass of a material in a given volume It is a physical property of a substance It is a physical property of a substance Density = Mass / Volume Density = Mass / Volume

Measuring Matter Sinking or Floating? Sinking or Floating? Density of water is 1 g/cm 3 Density of water is 1 g/cm 3 Objects with densities greater than that of water will sink Objects with densities greater than that of water will sink Objects with densities less that that of water will float Objects with densities less that that of water will float

Measuring Matter Example: Example: A solid block of wood floats while a solid block of iron sinks A solid block of wood floats while a solid block of iron sinks