UPSC CSE Prelims 2025 PYQ
Subject: Physical Geography
Updated:
Understand how the International Date Line affects time between Anadyr and Nome in this complex UPSC 2025 physical geography PYQ.
Difficulty
Hard
Skill Tested
Applied Logic
Topic Clusters
Consider the following statements:I. Anadyr in Siberia and Nome in Alaska are a few kilometers from each other, but when people are waking up and getting set for breakfast in these cities, it would be different days.
II. When it is Monday in Anadyr, it is Tuesday in Nome.Which of the statements given above is/are correct?
1. I. Anadyr in Siberia and Nome in Alaska are a few kilometers from each other, but when people are waking up and getting set for breakfast in these cities, it would be different days.
2. II. When it is Monday in Anadyr, it is Tuesday in Nome.
⚡ Quick Recall Snippet
The International Date Line creates a massive calendar difference between physically close locations. Anadyr in Russia and Nome in Alaska can experience the same time of day, but Anadyr will be one calendar day ahead.
Detailed Solution & Authority Citations
🚨 The Examiner's Trap
Statement II traps candidates who know there is a 1-day difference but mix up the direction of time travel. The Earth rotates West to East, meaning places in the extreme East (Siberia) experience the new day first. Thus, Russia is ahead, and moving east to Alaska means going 'back in time' to Sunday, not forward to Tuesday.
Active Recall Flashcard
If it is Monday in Anadyr, Siberia, what day is it in Nome, Alaska?
Sunday (Anadyr is ahead by almost 21 hours across the International Date Line).
Concept Flow Mapping
Logic Quest
"Why does the International Date Line zigzag instead of following a straight 180-degree longitude?"
Not analyzing core concepts like Mechanics of the International Date Line through the lens of Previous Year Questions is a serious miss-out. This PYQ engine is specifically designed to help you decode the examiner's mindset and master highly probable Physical Geography questions for your upcoming Prelims.