(Sarah of the Clue Crew gives the clue.) We've rubbed the pigment of a radish on these cards; lemon juice turns the pigment orange, indicating that it's an acid; milk of magnesia turns it blue, indicating that it's this
The roaster is computer-controlled which gives the roasting crew the... [DOC] [TLE] 2013 Abstracts - Connecticut Science & Engineering Fair [PAR] Feb 24, 2013 ...