Year 7 Science · Unit 2 · Lesson 17

Solutions

Foundation Worksheet

Name
Date
Class

Learning Goals

Warm Up

Fill the gap

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

solute solvent solution dilute concentrated saturated aqueous compound

When salt dissolves in water, the salt is the and the water is the . Together they form a . Because the solvent is water, we say the solution is . A solution with very little salt dissolved in a large amount of water is called . If the water is holding the maximum amount of salt it can at that temperature, the solution is .

Your Turn

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.

The solvent is the substance that gets dissolved in a solution.

Correct it:

T
F

Adding more solvent to a solution makes it more concentrated.

Correct it:

T
F

In salt water, water is the solvent and salt is the solute.

Correct it:

T
F

A saturated solution is one where extra solute will no longer dissolve at that temperature.

Correct it:

T
F

When sugar dissolves in water, the sugar particles are chemically changed into water particles.

Correct it:

T
F

Show What You Know

1. A student dissolves one teaspoon of sugar into 200 mL of water. Name the solute, the solvent, and the solution formed. Is this solution dilute, concentrated, or saturated?

Recall 2 marks

2. Explain why dissolving is a physical change, not a chemical change. Use the idea of particles in your answer.

Recall 2 marks

Wrap Up

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

HSCScience · Year 7 Science · Unit 2 · Lesson 17 · Foundation Worksheet