Upper atmosphere (ionosphere coverage): Which layers of the atmosphere are included within the ionosphere? Recognise that the ionosphere overlaps multiple high-altitude layers due to solar ionisation. Choose the most comprehensive option.
General Knowledge
World Geography
Difficulty: Easy
Choose an option
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AMesosphere
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BThermosphere
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CThermosphere and exosphere
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DThermosphere, exosphere and mesosphere
Answer
Correct Answer: Thermosphere, exosphere and mesosphere
Explanation
ConceptThe ionosphere is not a separate discrete layer; it is a region of ionised particles that overlaps mainly the thermosphere, extends upward into the exosphere, and reaches down into the upper mesosphere (D layer).