Which of the following is a general theory in geography that can be used to quantify and predict the interaction between two cities based on population sizes, distance between the places, the number of
migrants moving from one place to the other, or the flow of trade goods between the two locations?

Which of the following statements about pesticides and residue is false? a. most conventionally grown produce has detectable levels of pesticides when purchased from the store. b. the us government has determined that small levels of pesticides in produce is safe for humanconsumption. c. organic produce always will be pesticide-free. d. farm workers, children, and pregnant women are at greatest health risk from pesticides. select the best answer from the choices provided.

According ti the following map, what are the most common mineral resources found in the united states?

Which layer surrounds the center of the earth? a: crust b: core c: mantle