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II. The Greenhouse Effect
11. The sun’s radiation passes through _?_.

12. The sun’s radiation then is _?_ by the Earth’s surface.

13. Then, it is radiated as _?_ back into the atmosphere.

14. The atmosphere is like a _?_ because it traps and reflects the right amount of radiation to ensure that the Earth is not too cold or does not overheat.

15. Without the greenhouse effect process, the surfaces of the oceans would be _?_.