Density Know the density of some common materials.

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Presentation transcript:

Density Know the density of some common materials. Measure the density of a regular solid Measure the density of an irregular solid Measure the density of a liquid Record information in a table

Which is heavier? 5 kg 5 kg

Density Density is the mass of one cubic centimetre of a substance. So for example, gold has a density of 19.3 g/cm3. This means one cubic centimetre (cm3) of gold has a mass of 19.3 grams.

The formula! Density = mass volume Or using the formula triangle; m g/cm3 g Density = mass volume Or using the formula triangle; m D x V cm3

Density of regular shapes volume = length x width x height density = mass/volume mass using a scale height width length

Can you continue to measure your densities?

Extreme Density

Density of an irregular solid

…..Or

Can you write a sentence about what we have discovered?

Measuring the density of liquids

Density of water Density = mass/volume Volume Mass of water Mass of cylinder Mass of water and cylinder Density = mass/volume

Upthrust Gently lower a mass on a Newton meter into a beaker of water. Sketch a diagram in your book and write a sentence describing what happens.

What happens if the upthrust is equal to the force of gravity?

What happens if the upthrust is equal to the force of gravity?

Which will float?

Density of Water is 1g/cm3 Floating or Sinking? Density of Bone is 1.8g/cm3 Density of Cork is 0.24g/cm3 Density of Cork is 3.01g/cm3 Density of Ice is 0.90g/cm3 Density of Wood is 0.77g/cm3 Density of Water is 1g/cm3

Bonus experiment Density tower

Explaining density This is only a partial explanation! What is missing?

symbol Volume x10-24cm3 mass/g H 49062.5 1.67E-27 He #VALUE! 6.64E-27 Li 9572682.5 1.15E-26 Be 3634942.5 1.5E-26 B 1928352.5 1.79E-26 C 1077020 1.99E-26 N 862322.5 2.33E-26 O 678240 2.66E-26 F 392500 3.15E-26 Ne 3.35E-26 Na 18312480 3.82E-26 Mg 10597500 4.03E-26 Al 6132812.5 4.48E-26 Si 4179340 4.66E-26 P 3140000 5.14E-26 S 5.32E-26 Cl 5.88E-26 Ar 1123840.54 6.63E-26 K 33434720 6.49E-26 Ca 6.65E-26