Topic Isotherms
Asked 2 times across 2 UPSC exams over 4 years (2020–2024), peaking in 2024.
Key insights
- Most tested in CSE — 1 of 2 PYQs
- First appeared in CDS 2020 — 4 years before CSE 2024 (allied exams preview CSE)
- Most asked in 2024
- Recurs across 2 years (2020–2024)
How it travelled across exams
First appearance in each exam — the same idea, reframed.
CDS 2020 → CSE 2024
How the concept evolved
Rising — more than half its appearances (2 of 2) are since 2016.
Related concepts
Ideas UPSC tests alongside this one — keep exploring.
Sample questions
You've seen the pattern — here are a few of the actual PYQs.
CSE2024
Which of the following is/are correct inference/inferences from isothermal maps in the month of January ?
- The isotherms deviate to the north over the ocean and to the south over the continent
- The presence of cold ocean currents, Gulf Stream and North Atlantic Drift make the North Atlantic Ocean colder and the isotherms bend towards the north. Select the answer
using the code given below :
- A 1 only ✓
- B 2 only
- C Both 1 and 2
- D Neither 1 nor 2
✓ Correct answer: (A)
Geography › Climatology
CDS2020
The Isotherm Line, which divides India North-South in almost two equal parts in the month of January, is
- A 10 °C
- B 25 °C
- C 15 °C
- D 20 °C ✓
✓ Correct answer: (D)
Geography › Climatology
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