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7.2 Science Vocab.

Teacher: Nicole Bishop
The process by which water,ice,wind, or gravity moves fragments of rock and soil
Rich, fertile soil that is made up of about equal parts of clay, sand, and silt
Characteristic of materials such as sand and gravel that allow water to pass easily through them
A layer of soil that differs in color and texture from the layers about or below it
The type weathering which rock is physically broken into smaller pieces
The chemical and physical process that break down rock at Earth's surface.
Dark-colored organic material in soil
The layer of soil beneath the topsoil that contains mostly clay and other minerals
An organism that breaks down wastes and dead organisms
The loose, weathered material on Earth's surface in which plants can grow.
The loose layer of dead plant leaves and stems on the surface of soil
The process that breaks down rock through chemical changes
The grinding away of rock by other rock particles carried in water, ice, or wind
Mixture of humus, clay,and other minerals that forms the crumbly, topmost layer of soil
The solid layer of rock beneath the soil.
Process that splits rock when water seeps into cracks, then freees and expands