How often do spring and neap tides occur? twice a day
twice a month
every 27.3 days
every 24 hours

twice a month

Explanation:

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Spring and Neap rides occur twice a month

"d.) carbon dioxide and hydrogen sulfide"

the sun's light combined with the visible wavelenghts form what is called ultraviolet radiation, which are the long waves at the end of a visible light sprectrum.

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