4. Examine the photographs of sediment samples in the Unknown Samples Gallery, which is under Materials in the Lesson Resources. Match the pictured samples to the environments described in the Student Guide. Sample # Estimated % Biogenous Material Estimated % Terrigenous Material Roundness / Angularity Other Helpful Characteristics Type of Environment 1 2 3 4 5 6 7

The african continent is home of the worlds largest desert and longest river . t or f

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.

What is the largest river in the united states?