Year 7 Science · Unit 2 · Lesson 8

Separation Techniques — Filtering and Evaporation

Foundation Worksheet

Name
Date
Class

Learning Goals

Warm Up

True or False? Fix the false ones

Circle T or F for each statement. If the statement is false, rewrite it correctly on the line below.

Filtration can remove dissolved salt from saltwater.

Correct it:

T
F

Evaporation destroys the dissolved substance — it disappears along with the water.

Correct it:

T
F

Filtration works because the solid particles are too large to pass through the tiny pores in filter paper.

Correct it:

T
F

Separation techniques are chemical changes because they alter the substances in the mixture.

Correct it:

T
F

In evaporation, the solvent (water) turns to steam and leaves, while the solute stays behind.

Correct it:

T
F

Your Turn

Odd one out

Circle the item that does not belong in each group. Then explain why it doesn't fit.

#GroupYour answer (odd one + reason)
1 filtering    evaporating    using a magnet    baking
2 filter paper    funnel    conical flask    evaporating basin
3 sand in water    soil in water    chalk in water    salt in water

Show What You Know

1. A student mixes sand and water in a beaker. Describe the steps they would follow to separate the sand from the water using filtration. Name at least two pieces of equipment used.

Recall 2 marks

2. Why can't filtration be used to separate a saltwater solution? What technique should be used instead, and why does it work?

Recall 2 marks

Wrap Up

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

HSCScience · Year 7 Science · Unit 2 · Lesson 8 · Foundation Worksheet