Density!

Density tells us how heavy something An Elephant and a Mouse have the Density = MASS ÷ VOLUME Density tells us how heavy something is for its size. An Elephant and a Mouse have the SAME DENSITY!

Let’s practice calculating density! 25 grams of salami 5 mL = density of 5g/mL 16 grams of cheese 8 cubic cm. = density of 2g/cm3 Salami is more dense than Cheese!

We can use DENSITY to identify one element from another. Each cube is the same size, but has different masses and densities because of what they are made of!

One of these is not gold... Real Gold Fool’s Gold density = 19.3

We can also compare density without calculating it: Dense matter sinks in water, while less dense floats above it! cooking oil water motor oil

It is the same for gases: Hydrogen and Helium are less dense than Oxygen, so they float! H He Carbon dioxide (our breath) is more dense than Oxygen, so it sinks! CO2

The density of water is 1g/cm3 *Objects with a density greater than 1g/cm3 will SINK in water. *Objects with a density less than 1g/cm3 will FLOAT in water.