Question

question
the ________ is used to record ground shaking and the earthquake - magnitude scale was invented by ________.
answer
vibroscope; rector
seismograph; richter
rayoscope; mercalli
polygraph; freud
i dont know yet

Explanation:

A seismograph is an instrument that records ground - shaking during an earthquake. The Richter scale, which is a measure of earthquake magnitude, was invented by Charles Richter. A vibroscope is not the correct instrument for recording earthquake ground - shaking. A rayoscope is not related to earthquake measurement. A polygraph is used for lie - detection and has nothing to do with earthquakes.

Answer:

seismograph; Richter