Year 8 Science · Unit 3 · Lesson 7

Dissolving, Solutions and Separating Mixtures

Foundation Worksheet

Name

Date

Class

Learning Goals

Define solute, solvent, solution, and saturated solution.
Sort everyday mixtures into the correct separation technique category.
Explain why a particular separation technique is appropriate for a given mixture.

Warm Up

Sort it!

Write each mixture from the pool into the correct category box — the best method for separating it.

muddy river water saltwater alcohol and water sandy water sea water (to get fresh water) copper sulfate solution petrol and water muddy floodwater dissolved gold in solution mixed food dyes in water

Filtration

Evaporation

Distillation

Your Turn

Fill the gap

Choose the correct word from the word bank to complete each sentence. Two words will not be used.

solution solute solvent mixture filtration evaporation compound reaction

When salt dissolves in water, the salt is the and the water is the . Together they form a clear, uniform called a . To separate an insoluble solid like sand from water, you use . To recover salt crystals from saltwater, you heat the solution to allow of the water.

Show What You Know

1. Explain the difference between a solute and a solvent. Give one everyday example of each.

Recall 2 marks

2. Why can't you use filtration to separate dissolved sugar from water? What technique would you use instead, and why?

Recall 2 marks

Wrap Up

In one sentence, what was the main idea of this lesson?