Soils and weathering Flashcards
To completely weather a granite
Salt in the ocean
to get soil you need
Minerals
Organic material
air
water
Minerals-
organics Humus
Matter-
Hold H20 provides nutrients
keeps soil from compacting
Physical weathering
Affects rock by breaking down smaller pieces
Chemical weathering
disintegrate the rock to happen you need liquid water
Most common weathering
Frost wedging
Root wedging
roots go threw things material
Exfoliation sheeting granite
layers
Dessert
hot no water
Tropics
fastest for weathering
Temp wet/dry like Missouri
second at weathering
Artic
slow cold solid form of water
organic material
(Humus) air and water
Soil
combo of decomposed material
Earth worms
Great for crops
Soils layers from top to bottom
O A E B C R
Age of earth
4.6 billion years old
Universe age
13.7 billion years old