Chapter 2 review

By: ME (Ricky)

layers of soil

O horizon: Decomposed leaves Organic matter and humus they help to make the soil fertile

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

Mechanical weathering is the process of breaking big rocks into little ones. This process usually happens near the surface of the planet. Temperature also affects the land.You have probably noticed that no two rocks look exactly the same. Chemical weathering: Some look like they have been carved by a sculptor. Some look like they have been painted red, and others have been hollowed out to form caves.

3 Types of rocks

How to conserve soil

Fertile soil is valuable because it takes a long time to form. Soil can be damaged when it loses its fertility. Soil Conservation is a combination of practices used to protect the soil from degradation. First and foremost, soil conservation involves treating the soil as a living ecosystem