# 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

Density F

Density F ANS

Density H

Density H ANS

Video

Practicals

Demo:

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