science words Crossword

the process that breaks down rock through chemical changes
the solid layer of rock beneath the soil
the grinding away of rock by other particles carried by water,ice,or wind
dark colored organic material in soil
anything in the environment the humans use
a thick mass of grass roots and soil
the manigment of soil to prevent its destructs
mixture of humus,clay,and other minerals that forms the crumbly. top most layers of soil
the geologic princible that the same geologic process that operate today operatedin the past to change earths suface
the chemical and physical processes that break down rockat earths surface
plowing fields a long the curves of a slope to prevent soil loss
the planting of diffant crops in a feild each year to maintain the soils fertility
soil organism that breaks down the remains of organisms and digests them
the area of the great plains where wind erosian caused soilloss during the 1930s
the process by which water,ice,or wind moves weather rock or soil
a measure of how well soil supports plant growth
process that splitsrock when water seeps into cracks,then freezes and expands
the loose layer of dead plant leaves and stemson the suface of the soil
rich,fertile soil that made up of about equal parts of clay,sand and salt
the type of weathering in which rock is physically broken down into smaller peices
the loose,weathered materals on earths surface in which plants can grow \
soil conservation method in which the dead stalks from the previoues years crops are leftin the ground to hold the soil in place
a chemical change in which a substance comcombines with oxygen as when iron oxidates forming rust
characteristics of a materal that is full of tiny, connected air spaces that water can sleep through
the layerof soil that differs in color and texture from the layers above or below it
the layer of soil beneath the topsoil that cantians mostly clay and other minerals