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detect – v. discover or notice something
mobile – adj. able to be moved freely or easily
seismographic – adj. relating to equipment used to detect and measure earthquakes
tectonic plate – n. one of the parts of the earth's surface that move in relation to each other
primary – adj. earliest in time or order
tunnel – n. long passage that runs underground or through a mountain
elevator – n. a device that moves people and things up and down inside a building
screen – n. the flat panel area on an electronic device
accurate – adj. correct or exact
