Science Challenge #3 Question 1. What chemical substance do a diamond, a pencil and charcoal all have in common? ANSWER: Carbon Correct responses received from: Jennifer LeBlanc, Leonard Sturges, Dawn Jenkins Klus, Larry Coleman, Len Padilla, John DeCarvalho, Mike Gurnee, Jonathan Estill, Lauren Boyle, Robyn Carillo, Simon Evans, Dana Mackenzie, Peter Hance, Mark Baysinger, Eric Krejci, Carol Wynters, Chris & Elizabeth Hubbard