Pretest: The Precambrian Earth

In each example, the biosphere is interacting with another subsystem of Earth. Identify the other subsystem.

1. Marine life adds carbon dioxide to ocean water during respiration.
- Atmosphere
- Geosphere
- Hydrosphere

2. Plants on land release oxygen during photosynthesis.
- Atmosphere
- Geosphere
- Hydrosphere

3. Bacteria living underground convert ammonia to nitrates.
- Atmosphere
- Geosphere
- Hydrosphere

4. The waste from livestock adds nitrogen to the soil.
- Atmosphere
- Geosphere
- Hydrosphere

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The biosphere interacts with different Earth subsystems, such as the hydrosphere and atmosphere, demonstrating interconnectedness within Earth's systems.

Explanation:

Biosphere, the final of the four Earth spheres, is a complex system of abiotic and biotic components interacting with the atmosphere, hydrosphere, and lithosphere. For instance, marine life interacting with the ocean adds carbon dioxide to water during respiration, showcasing the interaction between the biosphere and the hydrosphere. Plants releasing oxygen during photosynthesis demonstrate the biosphere's interaction with the atmosphere.

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