The study of earthquakes is seismology. Scientists (seismologists) use instruments to record the strength of earthquakes in an area. The instrument that is used to measure seismic waves is called seismograph. <span>It records the shaking of the Earth. </span>The size of an earthquake is measured with its magnitude and intensity.
There are four nitrogenous bases involved.
A, T, C and G.
A:T and C:G
