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Some solutions can be made by mixing a solid and a liquid together, such as sugar and water as well as salt and water.
Solutions are uniform in appearance and the solid cannot be seen after mixing.
Teacher Input 1
Greet the learners.
Ask learners if they can remember from the previous lesson what a mixture is.
Answer: A mixture consists of two or more materials that are mixed together.
Remind the learners that in the previous lesson, they made a variety of mixtures. When they mixed some of the substances, they were able to see each material in the mixture. For example, when they mixed peanuts and raisins; they were still able to see the peanuts and the raisins. They stayed the same, the peanuts and the raisins did not lose their properties.
When they mixed other substances, they could not see the different materials after they had been mixed. For example, when they mixed the concentrated cool drink and water it looked as if the one substance had disappeared into the other one. Ask the learners if they can remember what such mixtures are called.
Teacher Input 2
Present an overview of the key terms, namely solution, solvent and solute, by using PRESENTATION 1: