When writing a hypothesis, you need to be able to say IF this, THEN this will happen.
The water from the ocean gets evaporated by the sun and travels as a gas into the clouds. As more and more water builds up in the clouds it will eventually rain or snow
Compositional layers are determined by their components, while mechanical layers are determined by their physical properties.
Answer:
The key factor in determining the habitable zone of a planet is looking for a Earth-like planet that is able to have water on it's surface, and make sure that it can still give or support life.
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