question: What will be done to the instrument before it measures the earthquake?
choices.text: safe operation changes in size wetted feedback assessed sterilized calibrated how they move
choices.label: A B C D E F G H
fact2: Seismometer Calibration : Instructions on how to calibrate a homemade seismometer.
combinedfact: Instruments must be calibrated before they can measure the magnitude of an earthquake.
formatted_question: What will be done to the instrument before it measures the earthquake? (A) safe operation (B) changes in size (C) wetted (D) feedback (E) assessed (F) sterilized (G) calibrated (H) how they move