Weathering
Carbonic acid
CO2 dissolved in rainwater can become ___.
Marble and limestone
Carbonic acid easily weathers ____.
Holes or soft spots
Chemical weathering makes ___ in rock which makes the rock break apart easier
Mineral makeup
Chemical weathering produces rocks that have a different ___ than the original rock
Mountains
Given enough time, physical weathering can wear away whole ___.
Together
Physical and Chemical weathering often work _______ or at the same time
Surface area
Physical weathering breaks rock into smaller pieces so more ___ is exposed on the rocks to chemical weathering
Slowly
Physical weathering works ___.
Lichens
Pioneer plants that are the first to grow onto bare rock.
Roots
Plant ____ can push into cracks and make weak acids that slowly dissolve rock
Acid rain
Rain with a lower pH than normal rain
Water
The MOST important agent of chemical weathering
Smaller
The forces of weathering break the rocks into ___ and smaller pieces
Abrasion
The grinding away of rock by rock particles carried by water, ice, wind, or gravity
Erosion
The movement of rock particles by wind, water, ice, or gravity
Weathering
The process that breaks down rock and other substances at the Earth's surface
Ice wedging
The process that splits rock when water seeps into cracks, then freezes and expands
Oxygen
This can cause rocks with iron in them to rust (oxidation)
Type of Rock AND Climate
Two most important factors that determine the RATE of weathering
Dissolving
Water weathers rock by ___ rock
Chemical
Weathering that breaks down rock through chemical changes
Physical
Weathering that physically breaks down rocks into smaller pieces.
Weathering & Erosion
Work TOGETHER to wear down and carry away rocks at Earth's surface
Permeable
____ (porous) rocks have faster weathering rates than other rock types
Hot and wet
______ climates have faster weathering rates than others