place the soil horizons in the correct order from top to bottom. predominantly organic, substratum or zone of mechanical weathering where bed rock is being broken down, unweathered rocks, chemically weathered minerals, mix of humus.

What evidence supports geological processes changing the surface of the earth? cutting down forests creates a decrease of habitats. tectonic plates uplift the rocky crust of earth to form mountains. competition in ecosystems creates a decrease in diversity. pollution runoff contaminates a lake.