Question

FAN AND MEDAL!

Seismic waves can be measured and recorded by devices called _______. These devices record the seismic wave vibrations as jagged lines on paper. The stronger the vibrations, the more jagged the lines. These recordings are called _______.
A.
seismograms; seismographs
B.
GPS transmitters; GPS receivers
C.
seismographs; seismograms
D.
GPS receivers; GPS transmitters

Answer 1

c I think

Answer 2

Thanks. :)