Lecture Notes: Earth's Spheres

Introduction

• Earth as a puzzle with four parts called "spheres."
• Spheres include all components of Earth, from ocean fish to the air.
• The four spheres are:
  • Geosphere
  • Biosphere
  • Hydrosphere
  • Atmosphere

Focus: Geosphere and Biosphere

Geosphere

• Definition: "Geo" means "ground" (Greek origin).
• Known as Earth's skeleton.
• Consists of non-living elements like:
  • Rocks
  • Minerals
  • Landforms (volcanoes, canyons, beaches, mountains)
• Geosphere is the base upon which other spheres exist.

Biosphere

• Definition: "Bio" means "life" (Greek origin).
• Comprised of living organisms.
• Made up of biomes, which are regions with similar life forms and climates.
  • Types of biomes include deserts, forests, rainforests, grasslands, wetlands.

Example Scene Analysis

• Scene: Forest meadow with birds, deer, mountain, stream.
• Geosphere Elements:
  • Non-living
  • Rock, soil, mountain, stream bed.
• Biosphere Elements:
  • Living organisms
  • Grass, birds, deer.

Conclusion

• Understanding of how geosphere and biosphere interact within Earth's system.
• Both spheres are interdependent and contribute to Earth's overall structure.

Personal Anecdote

• Reference to finding a hairbrush, indicating a return to daily life tasks.