...Kay, so I was doing [or trying to do] my homework, and it's pretty basic, actually. We're given a table comprising substances like "vegetable oil", "gatorade", "pencil lead", etc; and asked to predict its electrical conductivity. I tried Googling some of it, but nothing really relevant actually came up. I get the part that electrolytes are mainly solutions of acids, salts, and bases...but my question is: for substances like vegetable oil, how can you tell its electrical conductivity? ...Also, if I have a salt in solid form, will it conduct electricity as well?