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1 kg of feathers . 1 kg of stone. Which do you think would have the greater volume and mass?. OR. Objectives. The students should be able : To conclude that density is one of the properties of matter To analyze the effect of mass and volume to the density of a matter
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1 kg of feathers 1 kg of stone Which do you think would have the greater volume and mass? OR
Objectives • The students should be able : • To conclude that density is one of the properties of matter • To analyze the effect of mass and volume to the density of a matter • To determine the density of a matter • To apply the concept of density in daily life
DENSITY Density is defined as mass per unit volume. It is a measure of how tightly packed and how heavy the molecules are in an object. Density is the amount of matter within a certain volume.
To find the Density Measured the volume of liquid Volume of water = 720 ml
To find the density 1- Find the mass of the object 2- Find the volume of the object 3- Divide Density = Mass Volume
Units for density g/cm3 or g/ml Formula: m = mass V= volume D = density m= D x V V = m / D D = m/ V
To find density: • Find the mass of the object • Find the volume of the object • 3) Density = Mass : Volume Example: If the mass of an object is 35 g and it takes up 7 cm3 of space, calculate the density !
To find density: • Find the mass of the object • Find the volume of the object • 3) Density = Mass : Volume Ex. If the mass of an object is 35 g and it takes up 7 cm3 of space, calculate the density ! Set up your density problems like this: Given: Mass = 35 g Volume = 7 cm3 Unknown: Density (g/ cm3) Formula: Density = Mass : Volume = 35 g : 7 cm3 = 5 g/cm3
The density of matter is denoted with ρ. • The density is defined as the ratio of mass and volume • Equation of density is : Where : ρ = density ( kg/m3) m = mass ( kg ) V = volume (m3)
Conclusions • The density is not influenced by the mass and volume of the matter • The same matters have the same density too. • Different matters have different density either • The density is defined as the ratio of mass and volume • Equation of density is :
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