1. Geosphere: This is the solid, non-living part of the Earth, including the crust, mantle, and core. It encompasses rocks, minerals, and landforms.

2. Hydrosphere: This refers to all the water on Earth, including oceans, lakes, rivers, groundwater, and ice. It's crucial for life and weather patterns.

3. Atmosphere: This is the layer of gases that surrounds the Earth. It contains oxygen, nitrogen, carbon dioxide, and other gases essential for life. The atmosphere also protects us from harmful solar radiation.

4. Biosphere: This is the sum of all living things on Earth, including plants, animals, fungi, and microorganisms. It interacts with all other domains, influencing and being influenced by them.

These four domains are interconnected and constantly interact with each other, creating the dynamic and complex Earth system we know.