An item in America that demonstrates cultural diffusion?

In which area will soil formation be greatest? a a steep slope in a warm,b wet climate a flat area in a warm,c wet climate a north-facing area on a steep slope a flat area in a cold, d wet climate description

The earth is composed of three different chemical layers: core, mantle and crust. the formation of these layers was from a process called

What is the difference between the formation and characteristics of intrusive igneous rock and extrusive igneous rock?