Soil and Weathering
Science chapter 2
Formed by volcanoes when the lava dries.
Formed by heat and pressure.Very hard rocks.
Formed when layers of soil and sand stack up.Easy to break rocks.
Weathering and Erosoin
5 different types of Mechanical weathering.Animal Actions,release of pressure,plant growth,ice wedging,and abrasion.
5 different forms of chemical weathering.water,acid rain,oxygen,organisms growth,carbon dioxide.
O Horizon and A Horizon
O Horizon Top layer of soil.Has humus and is dark in color.A Horizon has worms and rodents.
B Horizon and C Horizon
B Horizon has minerals and deep roots of big plants.C Horizon has part weathered rocks.
Has not weathered rocks and last layer of soil.