CORE DEFINITIONS LOOP
Weathering = breakdown of rock at or near Earth’s surface
Erosion = removal of rock by water, wind, glaciers, gravity
Mechanical weathering = physical breakdown of rock
Chemical weathering = decomposition by chemical change
Frost action = water expands 9 percent when frozen
Soil = mix of sand, clay, humus from weathered rock
A horizon = leaching, darkest, most humus
B horizon = accumulation
C horizon = broken bedrock
Farther from shore = finer sediment