Soil and Weathering
Science chapter 2
Rock Cycle
Igneous Rocks!
Formed by volcanoes when the lava dries.
Metamorphic Rocks!
Formed by heat and pressure.Very hard rocks.
Sedimentary Rocks
Formed when layers of soil and sand stack up.Easy to break rocks.
Weathering and Erosoin
Mechanical Weathering
5 different types of Mechanical weathering.Animal Actions,release of pressure,plant growth,ice wedging,and abrasion.
Chemical Weathering
5 different forms of chemical weathering.water,acid rain,oxygen,organisms growth,carbon dioxide.
Soil layers
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.
Bedrock
Has not weathered rocks and last layer of soil.