Identify a single word that can replace each of the following expressions.Liquid in which a substance dissolvesInsoluble particles that settle to the bottom of a liquidSubstance that dissolves in a liquidMixture that is formed when a solute dissolves in a solventMixture in which the insoluble particles stay mixed throughout another substanceExplain how a colloid differs from a suspension.Copy and complete the diagram opposite by placing the correct term in the lettered boxes.How is homogenised milk different from fresh milk?ThinkIs smog a solution, suspension or colloid? Explain your answer.Cream and butter are both made from milk. What types of mixture are cream and butter?Many products contain chemicals called ‘emulsifiers’. What do you think these chemicals do?

1. Liquid in which a substance dissolves - Solvent
2. Insoluble particles that settle to the bottom of a liquid - Sediment
3. Substance that dissolves in a liquid - Solute
4. Mixture that is formed when a solute dissolves in a solvent - Solution
5. Mixture in which the insoluble particles stay mixed throughout another substance - Suspension

A colloid differs from a suspension in that the particles in a colloid are smaller and do not settle out when left undisturbed. This is because the particles in a colloid are dispersed throughout the mixture and are kept in suspension by the movement of the surrounding molecules.

The diagram cannot be completed as it is not provided.

Homogenised milk is different from fresh milk in that it has been processed to break down the fat molecules so that they stay integrated rather than separating out.

Smog is a colloid. This is because the particles of pollutants are dispersed throughout the air and do not settle out.

Cream is an emulsion, a type of colloid, where fat droplets are dispersed in water. Butter is a dispersion of water in fat, which is also a type of colloid.

Emulsifiers are chemicals that help mix two substances that would not normally mix well together, such as oil and water. They work by reducing the surface tension between the two substances, allowing them to form a stable, homogenous mixture.