What are the two major requirements for a planet to be considered habitable, and what role does the hydrosphere play in supporting life on Earth?
Understand the Problem
The question revolves around the Earth's subsystems and the concept of the hydrosphere as a critical component for habitability. It discusses the requirements for a planet to be habitable and provides details on the significance of water on Earth, specifically within the hydrosphere.
Answer
Liquid water and a stable star are key; the hydrosphere provides water and climate regulation.
The two major requirements for a planet to be considered habitable are: a star that survives long enough for life to develop and the existence of liquid water. The hydrosphere supports life by providing essential water for ecosystems and regulating climate.
Answer for screen readers
The two major requirements for a planet to be considered habitable are: a star that survives long enough for life to develop and the existence of liquid water. The hydrosphere supports life by providing essential water for ecosystems and regulating climate.
More Information
The 'Goldilocks zone' allows planets like Earth to maintain liquid water, essential for life. Earth's hydrosphere, which covers about 71% of its surface, is vital for sustaining the biosphere by providing water and enabling climate regulation.
Tips
A common mistake is ignoring the importance of the atmospheric conditions required to keep water in a liquid state.
Sources
- What makes a planet habitable - SEEC - NASA - seec.gsfc.nasa.gov
- Definition, Importance of Hydrosphere To Humans - BYJU'S - byjus.com
- Earth's Systems - National Geographic Education - education.nationalgeographic.org
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