breaking down rocks into small pieces
weathering
breaking down rocks into small pieces by hitting them or making them split (ex. sand blowing against rock)
physical weathering
breaking down rocks by chemicals in the air, water, or ground
chemical weathering
breaking down rocks caused plants, animals, or microbes
biological weathering
carrying away broken pieces of rock, often by wind, water, or ice
erosion
dropping off pieces of rock that were carried by wind, water, or ice
deposition
rotted plant and animal remains that becomes part of the soil
humus
any natural feature on Earth's surface
landforms
a flat stretch of land without any hills or mountains
plain
a low land between hills or mountains
valley
a deep, narrow landform with steep sides, usually with a river running through it
canyon
land built from pieces rock pieces dropped off at the end of a river
delta
a hill built from sand that is carried and dropped off by wind
sand dune
long, narrow land built up from sand dropped off shore
barrier island
a large moving sheet of ice
glacier