The rating system that estimates the total energy released by an earthquake is called the
a. richter scale.
b. moment magnitude scale.
c. mechanical seismograph scale.
d. mercalli scale

Which of the following regions has what is considered the most rugged terrain in oklahoma? a. the wichita mountains b. the arbuckle mountains c. the sandstone hills d. the ouachita mountains

The two types of plains are coastal plains and lowland plains

Which revelation resulted from the observation of the spectrum of different galaxies? a. there were more galaxies whose spectrum was blueshifted b. there were no galaxies whose spectrum was redshifted c. there were more galaxies whose spectrum was redshifted d. there were no galaxies whose spectrum was blueshifted