# 4.3.1.1

4.3.1.1 Density of materials

4.3.1.1 Density of materials

## Content

The density of a material is defined by the equation:

density = massvolume

ρ = Vm

density, ρ, in kilograms per metre cubed, kg/m3mass, m, in kilograms, kg

volume, V, in metres cubed, m3

The particle model can be used to explain

• the different states of matter
• differences in density.
• Students should be able to recognise/draw simple diagrams to model the difference between solids, liquids and gases.
• Students should be able to explain the differences in density between the different states of matter in terms of the arrangement of atoms or molecules.

WS 1.2 Use a variety of models such as representational, spatial, descriptive, computational and mathematical to solve problems, make predictions and to develop scientific explanations and understanding of familiar and unfamiliar facts.

MS 1a - Recognise and use expressions in decimal form

MS 1b -Recognise and use expressions in standard form

MS 1c - Use ratios, fractions and percentages

MS 3b Change the subject of an equation

MS 3c Substitute numerical values into algebraic equations using appropriate units for physical quantities

Resources

Video

Practicals

Demo:

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