Particle model of matter

• Density is a measure of how much mass a substance has per unit of its volume.
• To find the density of a substance, divide its mass by its volume.
• Density is normally measured in kilos per meter cubed.
• Aluminium has a density of 22710 kilos per meter cubed.
• Density can also be measured in grams per centimeter cubed.
• One gram per centimeter cubed is equivalent to 1000 kilos per meter cubed.
• To calculate the volume of a solid, divide the mass by the density.
• If the solid is irregular, find its volume using a Eureka can filled with water and an MD measuring cylinder.
• The volume of a solid in a Eureka can is equal to the volume of the solid plus the volume of the water that flows out.
• To find the density of a liquid, place an empty measuring cylinder onto a balance and zero the balance to reset it, then pour some of the liquid into the cylinder and record the mass.
• Divide the mass by the volume to find the density of the liquid.
• The larger the volume that you measure, the more accurate your density will be because it minimizes the effects of the uncertainty in taking your measurements.
• You can also take multiple measurements to identify any anomalies and calculate a mean.