| A | B |
|---|
| weathering | the chemical and physical processes that break down rock at Earth's surface |
| erosion | the process by which water, ice, wind, or gravity moves weathered rock and soil |
| abrasion | the grinding away of rock by other rock particles carried in water, ice, or wind |
| permeable | characteristic of a material that is full of tiny, connected air spaces that water can seep through |
| ice wedging | process that splits rock when water seeps into cracks, then freezes and expands |
| mechanical weathering | type of weathering in which rock is physically broken down into smaller pieces |
| chemical weathering | the process that breaks down rock through chemical changes |
| agents of chemical weathering | water, oxygen, carbon dioxide, living organisms, and acid rain |
| factors that determine rate of weathering | type of rock and climate |
| water | most important agent of chemical weathering |
