Soil_ The Living Foundation 7th grade geograph.pptx

Presentation on the soil. Describes the various layers of soil. It ends with describing how soil is important to humans.

1. Soil: The Living Foundation of Our Planet

2. What is Soil? A complex, living ecosystem Dynamic system constantly changing and evolving More than just dirt - a vibrant, interconnected environment Composed of minerals, organic matter, water, and air Home to billions of microorganisms

3. How Soil is Created Formed through weathering of rocks Biological and geological processes break down rock Organic matter from decomposing plants and animals Takes hundreds to thousands of years to develop Continuous cycle of creation and transformation

4. Layers of Soil Horizons

5. Soil Layer Exploration: O-Horizon (Topsoil) Uppermost layer of soil Rich in organic matter Dark color due to decomposed materials Highest concentration of living organisms Contains leaves, insects, microorganisms Primary zone of biological activity

6. Soil Layer Exploration: A-Horizon Mixed mineral and organic materials Primary zone for plant root growth Contains essential nutrients for plant life Lighter color than O-Horizon Critical for agricultural productivity

7. Soil Layer Exploration: B-Horizon (Subsoil) Less organic material Contains clay and mineral deposits Harder and more compact layer Stores water and minerals Supports deeper plant root systems Acts as a reservoir for nutrients

8. Soil Layer Exploration: C-Horizon Partially broken down rock layer Minimal organic content Source of mineral components Represents transition to bedrock Provides foundational structure for upper layers

9. Soil's Impact on Agriculture Provides nutrients for crop growth Supports global food production Determines agricultural productivity Hosts beneficial microorganisms Regulates water and nutrient absorption Bible: Parable of the Sower

10. Different Types of Topsoil

11. Soil in Construction Provides foundation for buildings Determines structural stability Used in road and infrastructure development Impacts engineering and architectural design Critical for urban and rural development Bible: Matthew 7:24-27

12. Environmental Sustainability Supports biodiversity Regulates ecosystem health Prevents erosion Captures and stores carbon Maintains ecological balance

13. Water Filtration Natural water purification system Filters contaminants Recharges groundwater Prevents pollution spread Supports clean water ecosystems

14. Climate Regulation Stores significant carbon dioxide Helps mitigate global warming Regulates temperature and moisture Supports plant life that produces oxygen Critical in global climate systems