How can mixtures of solids be separated?
Use tweezers to separate one type of solid from another.
Use a sieve with holes of the appropriate size. The smaller particles will pass through, and the larger particles remain in the sieve.
Wind throws lighter particles further than heavier particles.
You can use a magnet to separate iron filings from a mixture with sand.
Heating a mixture of iodine and sand will cause the iodine to sublime.
Salt dissolves in water. Sand does not. You can filter the sand from the mixture and recover the salt by evaporating the water from the filtrate.
You can separate copper metal from impurities by plating it onto a pure copper electrode.
Here's a summary of the separation procedures
And here's a video on the separation of solids.