question: what are used for observing materials up close?
choices.text: electricity microscopes camera lenses scales or plates mirrors crucial A hinged joint photography
choices.label: A B C D E F G H
formatted_question: what are used for observing materials up close? (A) electricity (B) microscopes (C) camera lenses (D) scales or plates (E) mirrors (F) crucial (G) A hinged joint (H) photography