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Weathering
The process of rocks breaking down

Erosion
The process of sediment moving

Deposition
When sediment drops in new location.

Sedimentary Rock
rock that is formed when layers of sediment are deposited, compacted, and cemented over long periods of time.

Sediment
broken down pieces of rock

Compacting and Cementing
the process where tiny pieces of rocks are SQUEEZED and "GLUED" together into a rock.

Frost Wedging
When water gets into rocks, freezes into ice and expands. This breaks rocks.

Acid Rain
Polluted rain that is mixed with elements like sulfur and nitrogen.

Gravity
A force that pulls things down

Sand Dune
A hill of sand, made and shaped by wind

Terraces
step like ledges cut into mountains where people grow plants to slow down erosion.

tree roots, moss, acid rain, water, wind, ice
causes of weathering

wind, water, glaciers, gravity
causes of erosion
