Summary:
- Gases, water, rock, and living organisms are all found at Earth's surface.
- These materials are also found above or below the surface.
- They interact with each other and in doing so alter each other.
- Earth has four layers: atmosphere, hydrosphere, biosphere, and lithosphere.
- All of Earth’s layers interact.
- Therefore, Earth”s surface is constantly undergoing changes.
- Use the resource below to answer the questions that follow: What are the four major systems of Earth?