The absolute age of a rock is expressed with a. numerical age, in years. b. comparisons to the age of other rocks. c. geologic symbols for rock layers. d. dates in roman numerals.

Technology has affected regional settlement patterns in what ways? choose all that apply. climatic improvement strategies have improved crop productivity. mechanized agricultural methods have improved agricultural productivity. participation in the global economy has increased urbanization. population shifts from urban to rural areas has increased as a result of petroleum production. settlement areas have increased as a result of improved water storage and delivery systems.