question: What does a seismometer do to seismic waves?
choices.text: it increases measures stops their speed grounds counterop waves at visibility
choices.label: A B C D E F G H
fact2: Seismic waves are produced by earthquakes.
combinedfact: a seismometer is used to measure seismic waves
formatted_question: What does a seismometer do to seismic waves? (A) it increases (B) measures (C) stops (D) their speed (E) grounds (F) counterop (G) waves at (H) visibility