question: what moves through different materials at different rates
choices.text: silk Speed food corn weater colors sound metal
choices.label: A B C D E F G H
fact2: Sound vibrations travel at different speeds through different materials.
combinedfact: Sound moves through different materials at different rates 
formatted_question: what moves through different materials at different rates (A) silk (B) Speed (C) food (D) corn (E) weater (F) colors (G) sound (H) metal