Mineral a is purple. mineral b is black. both minerals leave the same color streak. which of the following statements is true? a. both minerals have the same true color. b. both minerals have identical physical properties. c. mineral a is made from different elements than mineral b. d. mineral b is a gem, but mineral a is a common mineral.

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.