Density

Formula The definition of Density is the amount of molecules in a space The formula to find density is D=M / V M is for mass which could be measured with a Triple Beam Balance V is for volume, can be measured with a Graduated Cylinder or a ruler

Floating and sinking The Density of an object can determine if it floats or sinks If the Density is greater then 1.0 g/ml the object will sink If the object has a Density of 0.1g/ml through 0.9 g/ml it will float If the objects has a Density of 0.5 half of the object will be submerged in water

Floating and sinking (cont) But if the objects Density of 1.0 it will stay neutral or in the middle of the water

Constant Density is a Constant This means the density remains the same, it doesn’t change For example if you take a cork and cut it in half, the Density will not change When you cut an object the Mass and Volume change, but the Density remains a constant

Solids, Liquids, and Gases Densities A solid has a lot of molecules in a given space The more molecules the more mass which gives it a higher Density, which determines if it sinks or floats A liquid has not as much mass in a given space this gives it a lower density And a gas has not much mass for a lot of volume which gives it a lesser Density

Liquid The oil has a Density less then water which is 1.0 g/ml This causes it to float on top of the water

Solid This solid has a Density more then 1.0 g/ml therefore making it sink to the bottom If the objects Density was 1.0 g/ml it would neither float nor sink

Gas Gas has a low Density this is why it’s in our air we breathe The Molecules are very far apart not energetic

True or False Densities formula D=M/V? If the object has a Density of 1.1 it’s neutral? Do you use a scale to find Density? Solids Densities are always less then 1.0? Volume can be recorded with a Graduated Cylinder?

Answers True False

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