What is the Richter scale? What is meant by the Richter scale increases exponentially?

The earth's internal process which drives seafloor spreading is

#4.) describe the most likely weather conditions at indiana / ohio boarder. also could someone double check my other answers? i'd really appreciate it

Using examples from various part of the world that is countries, examine the assertion that mere presence of abundant natural resources in a country does not guarantee rapid socio economic development?