question: bone is stronger but less what than the material that covers it
choices.text: surface weight flexible key element damaging viscous fluid money
choices.label: A B C D E F G H
fact2: Articular cartilage is the cartilage that covers the bone and the joint areas.
combinedfact: bone is  less flexible but stronger than the material that covers it
formatted_question: bone is stronger but less what than the material that covers it (A) surface (B) weight (C) flexible (D) key element (E) damaging (F) viscous (G) fluid (H) money