NSSS7.1

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=7.1 Rocks and Weathering=

Vocabulary

 * Weathering**: The process that destroys or breaks the rocks and other substances on Earth's surface.
 * Erosion**: The movement of the particles of rock by wind, water, ice, or gravity is called erosion.
 * Mechanical Weathering**: The weather in which rock physically breaks into small pieces is called mechanical weathering.
 * Abrasion**: The grinding away of rocks by water, wind, ice, or gravity is called abrasion.
 * Ice Wedging**: The process in which wedges of rock widen and deepen in cracks is called ice wedging.
 * Chemical Weathering**: The process in which rocks break down because of chemical changes.
 * Permeable**: Permeable means that a material is filled with tiny, connected holes where water can seep through.