hi l am back and we ave been doing science so how we did it miss dale mixed sand,salt,rice,and rocks it was impossible because we had to separate it back to sand salt rocks and rice. to start this is easy pick out the rocks and sit the to side then get a sive and sive the rice with the sand and salt. Then you need a funal,and a pice of filter paper and fold it into four and make it into a cone and put in to the funal the get sand and put it in the put water in it then wait. Then you will get salt water and the u want to get a pice of black paper and poar the water on it carefully put it on something warm like a retarder then wait and there you have your salt and that is how u separate sand salt rice and rocks bye!!!!!!!!!!!!