EarthSci - 2nd Quarter: Summative

Chemical Weathering

changes the mineral content and the chemical composition of rocks

Mechanical weaheringg

1. temp change

2. abbrasion

3. freeze thaw cycle

   1. plant grwoth and animal burrpwing

hydrolysis

water reacts with minerals to form new minerals and dissolved ions weakening the original rock

carbonation

where CO2 from the air or soil mixes with water to form a weak carbonate acid H2CO3 This acid reacts with minerals in rocls that contain calcium carbonate such as limestone

acidification

acids from pollution acid rain or natural sources react with minerals causing them to break down

weathering

breaking of rocks

exogenic

happens at the surface

endogenic

process that shape the surface that originate from within the earth

erosion

process by which weathered rocks particles so or sediments are moved `from one place to another

deposition

process in which sediment are deposited in one area known as sedimentation

residual heat

• dusk rock gas collided and compressed under gravity

• this pressure and friction produced enormous heat that is still trappe

radioactive decay

• certain elements in the earths interior release heat overtime as they decay

magmatism

• process which magma forms due to decresaed

• rock pressure

  • no heat

flux melting

• occurs when solid rock melt into magma through addition of water or other

  • hot dry liquid is mixed with any liquid then faster melting

metamorphism

• formation of metamorphic rocks

  • change in mineral composition and texture of a rock that is subjected to high temp pressure and chem change

contact

• comes in contact with an already existing body of rock. when this happens the existing rock temp rises and becomes capiltrated with fluid from the magmga

  • non foiliated

dynamic

• result of very high sheear stress occus along fault lines

  • occurs at relatively low temp

recrystallization

• rearrange of molecules

• the process by when crystal are packed together creating new metal structire

  • limestone to marble

neometamorphism

process that results in the formation of new mineral