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Density

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  1. Density

  2. 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

  3. 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

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

  5. 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

  6. 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

  7. 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

  8. 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

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

  10. 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?

  11. Answers • True • False • False • False • True

  12. The End

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