Weathering

• Gravity is one of the agents of weathering.
• Exfoliation occurs when water continually seeps into cracks, freezes and expands eventually breaking the rock apart.
• Carbonation occurs when carbon dioxide dissolved in water makes acid and reacts with rocks.
• Burrowing animals cannot contribute on weathering of rocks.
• Hydrolysis takes place when acid rain reacts with rock-forming minerals such as feldspar to produce clay and salts that are removed in solution.
• Animals produce acidic compounds that can cause rock disintegration.
• Sulfur dioxide and nitrogen oxide when mix with water produces basic substance that can break down rocks’ components.
• Humans indirectly contribute on weathering.
• Water alters chemical components of rocks that cause weathering.
• Earthworms are physical weathering agent.
• Even small plants, such as mosses, can enlarge tiny cracks as they grow.
• Temperature changes can contribute to weathering through the process called thermal stress.
• During thermal stress, rocks tend to expand with heat and contract with low temperature.
• Biological Weathering by Physical Means involves burrowing animals like shrews, moles and earthworms creating holes on the ground by excavation and moving rock fragments to the surface.
• Carbonation is a type of chemical weathering where carbon dioxide in the air dissolves in rainwater and becomes weakly acidic, which can dissolve limestone as it seeps into cracks and cavities.
• Oxidation is a type of chemical weathering where rock is broken down by oxygen and water, often giving iron-rich rocks a rusty-colored weathered surface.
• Exfoliation can happen as cracks develop parallel to the land surface as a consequence of the reduction in pressure during uplift and erosion.
• Plants contribute to weathering when the seeds of a tree are spread in the environment and sprout in soil that has collected in a cracked rock.
• Abrasion occurs when rocks surface is frequently exposed to water, wind and gravity.
• Animals that tunnel underground, such as moles and prairie dogs, also work to break apart rock and soil.
• Hydrolysis is a type of chemical weathering where acidic water reacts with rock-forming minerals such as feldspar to produce clay and salts that are removed in solution.
• Hydration is a type of chemical weathering where water reacts chemically with the rocks, modifying its chemical structure.
• As the roots of trees grow, they widen the cracks, eventually breaking the rock into pieces.
• Biological Weathering by Chemical Compounds involves some plants and animals producing acidic substances that react with the rock and cause its slow disintegration.
• Freeze-thaw occurs when water continually seeps into cracks, freezes and expands, eventually breaking the rock apart.
• As this happens repeatedly, the structure of the rock weakens and over time crumbles.
• This process includes degradation or breaking down of rocksinto smaller segments known as sediments.

  Weathering
• Weathering occurs when mechanical force isapplied on rocks or through chemical reactions happening on the surface or within the rocks.
• Water seeped into cracks and crevices of rocks and when the temperature dropped, it freezes and definitely will expand in the form of ice.
• Salt is an agent of weathering through a process called haloclasty
• During thermal stress, rock tend to expand with heat and contract with low temperature.
• Its contribution take place when the seed of a tree being spread in the environment sprout in soil that has collected in a cracked rock.

  Plants
• Animals that tunnel underground, such as moles and prairie dogs, also work to break apart rock and soil.
• It occurs when rocks surface is frequently exposed to water, wind and gravity.

  Abrasion
• It occurs when water continually seeps into cracks, freezes and expands, eventually breaking the rock apart.

  Freeze-thaw
• It can happen as cracks develop parallel to the land surface as a consequence of the reduction in pressure during uplift and erosion.

  Exfoliation
• Exfoliation occurs typically in upland areas where there are exposures of uniform coarsely crystalline igneous rocks.
• Carbon dioxide in the air dissolves in rainwater and becomes weakly acidic.


  Carbonation
• Give me the three kinds of Physical Weathering

  • Abrasion
  • Freeze-thaw
  • Exfoliation
• It is the breakdown of rock by acidic water to produce clay and soluble salts.

  Hydrolysis