8. which statement best describes the richter scale?
a. it's named after a scientist who studied tornadoes.
b. it's a numerical rating system that measures the largest seismic waves during an earthquake.
c. it's a test given to all geologists.
d. it's a numerical system that measures the smallest seismic waves during an earthquake.

Answer;

D. It's a numerical system that measures the smallest seismic waves during an earthquake.

Explanation;

-The Richter magnitude scale is a scale of numbers used to tell the size of earthquakes. It is a standard scale used to compare earthquakes. The scale was invented by Charles Francis Richter and was based on the seismogram measured by a particular type of seismometer at a distance of 100 kilometres (62 mi) from the earthquake.

covalent bonding is a form of chemical bonding between two non metallic atoms which is characterized by the sharing of pairs of electrons between atoms and other covalent bonds.

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