Make the idea your own
- 1Read the inputs and predict what will change.
- 2Change one parameter while keeping the other fixed.
- 3Explain the result using the diagram and the live values.
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Class 10 · Geography
Longitude and solar time
Interactive explanation Gamified quiz, feedback & rewards
0 XP0 mastered
Suggested-level exploration · Learning goals & preparation
By the end, you can…
- Explain Time difference = (longitude − reference) × 4 minutes
- Change one input at a time and predict its effect before checking the model.
- Apply the relationship in a quiz and explain the reasoning behind your answer.
Useful preparation: Directions, units and interpreting maps. Suggested previous stop: Read contour lines.
This topic has a suggested learning level. A matching chapter in the current NCERT edition has not been verified, so it is not labelled as syllabus coverage.
Interactive exploration · Class 10
Longitude and solar time
Class 10
CLASS 10 · CONCEPT QUEST
Turn understanding into a small adventureLongitude and solar time
Discover the rule, predict what happens, then put the idea to work.
DiscoverFind the idea→PredictThink it through→ApplyMake it click
3 rounds · no timer · up to 100 XP for your best result
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The relationshipTime difference = (longitude − reference) × 4 minutes
Notice the pattern
East is ahead in this model. Differences are unwrapped, so no date-line correction is applied.