sand iron filings salt water cooking oil rubbing alcohol (optional for upper grades) Each group will make observations concerning the formation of each of the mixtures.
(oil; rubbing; alcohol) (Each group; will make; observations concerning the formation of each of the mixtures) (observations; concerning; the formation of each of the mixtures)
oil Each group observations
rubbing will make concerning
alcohol
observations concerning the formation of each of the mixtures
the formation of each of the mixtures