Separating mixtures

Today we found out that some pesky pixies had mixed some of Ms Green's materials. How mischievous! Ms Green challenged us to separate the mixtures, and return each ingredient to her in its original condition. What a task! Here are the different mixtures:

pasta and sand

pasta and rice

rice and sand

dal and rice

dal and salt

rice and sugar

sand and sugar

cornflour and salt.

How would YOU separate them?

Here are some pictures showing you what we did: