Which Atmosphere term is correctly associated with location: “lies above the mesopause”, and also with “temperature rises greatly as high-energy radiation is absorbed”?

Correct Answer: Option B — Thermosphere. Thermosphere is correct because it is lies above the mesopause. Thermosphere is also associated with temperature rises greatly as high-energy radiation is absorbed. A further identifying fact is that Thermosphere is temperature rises greatly as high-energy radiation is absorbed. Another useful fact is that Thermosphere is associated with auroras occur mainly in this region. Why the other options are incorrect: Option A — Exosphere: It is gradually merges into outer space and is associated with particles are extremely sparse; those are the identifying facts of Exosphere. Option C — Ozone layer: It is located mainly in the stratosphere and is associated with absorbs much of the Sun's harmful ultraviolet radiation; those are the identifying facts of Ozone layer. Option D — Jet stream: It is generally found near the tropopause and is associated with mainly flows from west to east; those are the identifying facts of Jet stream. Exam Takeaway: Link Thermosphere with “lies above the mesopause” and “temperature rises greatly as high-energy radiation is absorbed” for quick revision.