Page 1 Which do you think would have the greater volume and mass? 1 kg of feathers1 kg of stone OR
Page 2 Objectives The students should be able : 1.To conclude that density is one of the properties of matter 2.To analyze the effect of mass and volume to the density of a matter 3.To determine the density of a matter 4.To apply the concept of density in daily life
Page 3 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.
Page 4 Proof that water and ice have different densities
Page 5 To find the Density Measured the volume of liquid Volume of water = 720 ml
Page 6 Measured the volume of stone
Page 7 Measured the mass of stone
Page 8 To find the density 1- Find the mass of the object 2- Find the volume of the object 3- Divide Density = Mass Volume
Page 9 Units for density g/cm 3 or g/ml Formula: m = mass V= volume D = density m= D x V V = m / D D = m/ V
Page 10 1)Find the mass of the object 2)Find the volume of the object 3) Density = Mass : Volume To find density : Example: If the mass of an object is 35 g and it takes up 7 cm 3 of space, calculate the density !
Page 11 1)Find the mass of the object 2)Find the volume of the object 3) Density = Mass : Volume To find density : Set up your density problems like this: Given: Mass = 35 g Volume = 7 cm 3 Unknown: Density (g/ cm 3 ) Formula: Density = Mass : Volume = 35 g : 7 cm 3 = 5 g/cm 3 Ex. If the mass of an object is 35 g and it takes up 7 cm 3 of space, calculate the density !
Page 12 ρThe 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/m 3 ) m = mass ( kg ) V = volume (m 3 )
Page 13 The layer sequence based on its density
Page 14 Conclusions The density is not influenced by the mass and volume of the matter The density is not influenced by the mass and volume of the matter The same matters have the same density too. The same matters have the same density too. Different matters have different density either Different matters have different density either The density is defined as the ratio of mass and volume The density is defined as the ratio of mass and volume Equation of density is : Equation of density is :
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