Coal is derived from which of the following materials? marine organisms plants rocks salts

Distance that the transcontinental railroad covered from omaha to san francisco.

Which are practical examples of how people in the developed world could make a big difference in how much water they use check all that apply a. use lightbulbs that use less electricity b. consider using a composting toilet that does not use water c. avoid using your telephone during peak hours d. do not read books

Which of the following is the unit of measurement used to describe the severity of an earth quake? velocity, magnitude, volume, density.