2001The vertical section of the soil from the surface down to the bedrock, showing different layers, is known as soil?See more
2001Western Europe and North Eastern U.S.A. are the most industrialization regions of the world because they?See more
2001The population of a town in 1975 was 210,000 but grew to 280,000 in 1980. What was the the annual growth rate?See more
2001Nucleated groups of houses occupied largely by people engaged in primary occupation are referred to as?See more