Chapter 2 review
By: ME (Ricky)
layers of soil
A horizon: it is a soft layer it is rich in humus and nutrients it is shelter for living organisms
B horizon: this is a hard compacted layer this layer contains may minerals.
C horizon: There are slightly weathered parent rocks on this layer. they contain many cracks
Bedrock: this is the last layer of soil, it is also very hard it consists unweathered parent rocks
How soil forms: Soils form an almost complete skin over the earth, broken only by oceans and other water bodies and by mountains that have yet to develop a soil cover.
mechanical and chemical weathering
3 Types of rocks
Sedimentary rocks form over millions of years as particles of sediment are deposited and then squeezed and glued together
Metamorphic rock is formed by heat and pressure it can also change granite during this formation.
igneous rock is formed by volcanic activity. It slowly hardens at or beneath the surface