1) Density = mass ÷ volume

2) Factor 1: what the substance is made out of

Factor 2: how the particles are arranged

3) 1 ml = 1 cm^{3}

4) Measure the mass of the object by using a mass balance

Fill a eureka can up to the spout and put an empty beaker underneath the spout

Lower the object gentle into the water in the eureka can

The object will displace some of the water resulting in water running down the spout and into the beaker

Measure the volume of water that has been displaced (1 ml is equal to 1 cm^{3}) – this is equal to the volume of the irregular object

We then work out the density by dividing the mass by the volume

5) We measure the mass of a liquid by placing an empty beaker onto a mass balance and pressing 0 to make this mass 0. We then pour in a certain volume of the liquid (like 50 ml) into the beaker on the mass balance and measure the mass. We then divide the mass of the liquid (measured from the mass balance) and the volume of the liquid (which is 50 cm^{3} for my example) to get the density of the liquid

**Questions**

1) Write down the formula/ calculation for working out density.

2) What are the two factors that affect the density of a substance?

3) 1 ml of water is how many cubic centimetres?

4) How can we work out the density of an irregular object? Write a fair amount.

5) How can we work out the density of a liquid? Write a fair amount.