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OCR: ION SP H ER The atmospheric layer from 65 to approximately 800 km above sea level (on Earth, though other planets also have ionospheres) where the effects of solar radiation and the solar wind Exosphere cause ionization OT many of the atoms and moleci ules These solar events sometimes dramatically affect the identifiable ionospheric strata that reflect radio waves pue enable long range communication. Thermospher lonosphere Mesosphere Stratosphere Ozone Troposphere IONOSPHERE molecules amatically