Interior of the Earth · Class 11 Geography · Chapter 3
🌍 Interior of the Earth
CBSE Class 11 Humanities & Commerce · Geography · Chapter 1
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Six free PDFs + an editable PPTX cover every angle of this chapter — read the deck, drill the MCQs, sit the full paper, then check against the marking scheme.
📖Notes Deck
Full lecture deck with teaching paragraphs, misconception red-boxes, and glossary. Read this first.
Download PDF →📝Quick Drill
15 pattern-tagged MCQs with per-Q time budget. Drill under a 20-min timer.
Download PDF →📄Exam Paper
Full exam-pattern paper with sections. Sit it closed-book before checking the marking scheme.
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Model answers + topper-template structures examiners reward with full credit.
Download PDF →⚡Cheat Sheet
1-page exam-day card: key points, top question patterns, 90-minute revision flow.
Download PDF →👨👩👧For Parents
1-page plain-language parent guide: what's being learned + questions to ask your child.
Download PDF →Top question patterns · CBSE annual / SQP aggregate
| 85% | P-waves vs S-waves and the shadow zones — P fast, all media; S slow, solids only. S-shadow past 105 deg -> liquid outer core. P-shadow = 105-145 deg ring (refraction). | 5 MARKS |
| 75% | Direct and indirect sources of information about the interior — Direct: mining, Kola drilling, volcanic eruptions (crust only). Indirect: density/pressure/temp, meteorites, gravity, magnetism, seismic waves. | 5 MARKS |
| 70% | Layered structure (crust / mantle / core) + discontinuities — Crust SIAL/SIMA + Moho; mantle solid + plastic asthenosphere; core outer liquid + inner solid; Gutenberg & Lehmann. | 5 MARKS |
| 55% | Focus, epicentre, seismograph — defining an earthquake — Focus inside (source), epicentre on surface above it, seismograph records the waves; greatest damage near epicentre. | 3 MARKS |
| 60% | Volcanoes / intrusive vs extrusive volcanic landforms — Intrusive cools below ground (batholith, laccolith, sill, dyke); extrusive erupts at surface (lava flows, cones, shield/composite volcanoes). | 5 MARKS |
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