I'm going to combine two substances, table salt and iron filings. When you combine two or more substances, what is it called?
What do you notice? Does the salt still look like salt? Is the iron still iron? How can I separate them back into their lone substances?
I'm going to use what I know about the physical properties of salt and the physical properties of iron to separate them back into their original substances. I know that iron is magnetic and salt is not, so one way I can do this is with a magnet.
