1inch on a map represents 200 miles it is 1/2 inch from milwaukee, wisconsin to chicago illinois. how far would this be

What role did the waterways of europe play in development of europe's economy

An earthquake’s epicenter can be determined from arrival time data recorded on a(

Can someone me choose a broad topic and area of focus i am really doing this as a tally to see which one most people pick ok water pollution global warming endangered species atmosphere for the !