Density A Look at Density and How to

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Density A Look at Density and How to Calculate It

Density A Look at Density and How to Calculate It

Definition of DENSITY: �The RATIO of the mass of a substance to the space

Definition of DENSITY: �The RATIO of the mass of a substance to the space it takes up (volume) § Substances have a characteristic density § Determined by how compact the atoms are inside

�The maximum density of MOST materials occurs in the SOLID phase… � solids have

�The maximum density of MOST materials occurs in the SOLID phase… � solids have high densities � gases have low densities

�Can you think of an exception to this rule?

�Can you think of an exception to this rule?

�What happens to the molecules in liquid water as water freezes?

�What happens to the molecules in liquid water as water freezes?

�Molecules move farther apart and EXPAND! �Ice (solid water) is LESS dense than liquid

�Molecules move farther apart and EXPAND! �Ice (solid water) is LESS dense than liquid water �It floats in liquid water!

Will it Float? �Density can predict if something will float. �How?

Will it Float? �Density can predict if something will float. �How?

Will it Float? �The density of liquid water is 1 g/m. L. �Objects with

Will it Float? �The density of liquid water is 1 g/m. L. �Objects with a HIGHER density than water will ____. �Think of some examples…

It Floats �If it has LOWER density, it will ____. �Think of some examples…

It Floats �If it has LOWER density, it will ____. �Think of some examples…

Other factors that affect DENSITY: �The density of a GAS varies with pressure and

Other factors that affect DENSITY: �The density of a GAS varies with pressure and temperature: • Higher temperature – molecules farther apart – LESS dense • Lower temperature – molecules closer together – higher pressure - MORE dense

Units for Density �Just like length, volume and mass, density has to be labeled

Units for Density �Just like length, volume and mass, density has to be labeled with the correct unit… �g/cm³ or g/m. L is the standard unit for density. 1 cm³ = 1 m. L

DENSITY Density and Buoyancy Key Points Density DensityDENSITY Density and Buoyancy Key Points Density Density
Look left right Look up look down LookLook left right Look up look down Look
Look Up Look Down Look Back Look ForwardLook Up Look Down Look Back Look Forward
Look up look down Look up look downLook up look down Look up look down
Density and Pressure Density and Pressure Define densityDensity and Pressure Density and Pressure Define density
Density and Air Pressure What is Density DensityDensity and Air Pressure What is Density Density
Density and error Density Density Compares mass amountDensity and error Density Density Compares mass amount
Density Salinity Temperature Density and Oceans Density isDensity Salinity Temperature Density and Oceans Density is
9 1 Density and Pressure Density The density9 1 Density and Pressure Density The density
Density and Flotation What is density Density tellsDensity and Flotation What is density Density tells
MATTER AND DENSITY DENSITY Density is a measureMATTER AND DENSITY DENSITY Density is a measure
Density 1 3 What is density l DensityDensity 1 3 What is density l Density
Density Density density comparison of how much matterDensity Density density comparison of how much matter
Density Notes What is density Density is aDensity Notes What is density Density is a