Mixture

8.1.1

Describe methods to separate a mixture of various materials or objects.

8.1.2

Provide reasoning about the method used to separate a mixture of various materials or objects.

Look at this mixture. It is a mixture of muruku and nuts. How would Kugan and Kanang separate the mixture of muruku and nuts?

We can separate various materials in a mixture using different methods.

Kugan and Kanang can separate the mixture of muruku and nuts by using the hand-picking method.

Why is the hand-picking method used to separate this mixture?

This is because nuts and muruku are large and have different shapes.

Do you know how to separate the other mixtures?

Suddenly, his brother adds some raisins into the flour.

How can Kugan separate a mixture of raisins and flour?

Kugan separates a mixture of flour and raisins using the sieving method.

Why did Kugan choose that method?

The sieving method can separate fine-sized materials and large-sized materials.

Study at situation 2. How can Kanang separate his paper clips from the sand? 

Kanang can separate the mixture of paper clips and sand using a magnet.

Study at situation 3. How can we separate a mixture of sand and decayed wood debris?

We can separate this mixture using the floatation method.

Yes. Wood debris can float in water.

Study situation 4. Filter the mixture using a filter paper into a conical flask.

Pieces of hibiscus petals will remain on the filter paper. Coloured liquid will be collected in the conical flask.

Please do exercise at page 100 textbook in your exercise book. Thanks..