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Answer:
The Earth is composed of four main subsystems, also known as spheres, which interact with each other to make up the larger system of the planet. The four main subsystems are:
1. Atmosphere
2. Hydrosphere
3. Geosphere (or Lithosphere)
4. Biosphere
Here are some fill-in-the-blank statements related to these subsystems:
1. The __ is the layer of gases surrounding the Earth, which includes the air we breathe.
• Atmosphere
2. The __ encompasses all the water on Earth, including oceans, rivers, lakes, and glaciers.
• Hydrosphere
3. The __ refers to the solid parts of the Earth, including rocks, minerals, and the landforms like mountains and valleys.
• Geosphere (or Lithosphere)
4. The __ includes all living organisms on Earth, from the smallest bacteria to the largest mammals, and their interactions with the other subsystems.
• Biosphere