Plus One Geography Public Exam
March 2026 Question Paper – Answer Key (all sections)
SECTION A – 1 score each
1.Most popular argument regarding origin of universe (c) Big Bang Theory
2.Most explosive of earth's volcanoes (b) Composite
3.Major plates according to plate tectonic theory (a) 7
4.Prime force responsible for mass movement (a) Gravity
5.Gas largely responsible for greenhouse effect (b) Carbon-dioxide
6.Frozen raindrops & re-frosted melted snow water (d) Sleet
7.A cold current (c) Labrador
8.Indian standard time ahead of GMT by (a) 5 hours 30 minutes
SECTION B – 2 scores each (any 10)
9.Four branches of Biogeography Phytogeography, Zoogeography, Ecology, Pedology
10.Four effects of earthquake Ground shaking, landslides, fires, tsunamis
11.Two minor plates Cocos plate, Nazca plate (or Philippine / Arabian)
12.Classify: Alluvial fans, V-shaped Valley, Deltas, Gorge Erosional → V-shaped Valley, Gorge · Depositional → Alluvial fans, Deltas
13.(a) Insolation Solar radiation received by Earth (b) Inversion of temperature Temp increases with altitude (abnormal)
14.ITCZ ? Inter‑Tropical Convergence Zone; low‑pressure near equator
15.Forms of condensation Dew, frost, fog/mist, clouds
16.Greenhouse effect & two gases Natural trapping of heat; CO₂, CH₄ (or water vapour, N₂O)
17.Factors affecting ocean salinity Evaporation, precipitation, river inflow, winds, currents, freezing/melting
18.What is Bio‑diversity ? Variety of genes, species & ecosystems on Earth
19.Ganga river system note Bhagirathi + Alaknanda at Devprayag; flows through Uttarakhand, UP, Bihar, WB; major tributaries Yamuna, Son, Ghaghara; forms Sunderbans delta
20.Two mitigation measures for earthquake Earthquake‑resistant construction; avoid high‑risk zones
SECTION C – 3 scores each (any 6)
21.Layers of earth interior Crust (outer), Mantle (semi‑solid), Core (inner NiFe) – liquid outer & solid inner.
22.Big Bang Theory Universe began as singularity 13.8 bya, expanded & cooled → formed particles, stars, galaxies.
23.Three evidences for Continental Drift Jigsaw fit (S America–Africa); identical fossils (Mesosaurus); matching mountain belts (Appalachian–Caledonian).
24.Classify weathering + explain one Physical, chemical, biological. Ex: Physical → exfoliation/unloading due to pressure release.
25.Table: erosional / depositional (Hanging valley, Moraines, Uvala, Bar, Cliff, Stalactite)
| SI No. | Erosional | Depositional |
|---|---|---|
| A | Hanging valley | Moraines |
| B | Cliff | Bar |
| C | Uvala | Stalactite |
26.Troposphere & Stratosphere features Tropo: weather layer, temp ↓ with height. Strato: ozone layer, ideal for flight, temp ↑ with height.
27.Tides based on frequency Diurnal (1 high,1 low), Semi‑diurnal (2 equal), Mixed (2 unequal tides).
28.SW monsoon characteristics (India) June–Sept, burst of monsoon, orographic rainfall, uneven distribution, drop in temperature, retreat by Sept.
SECTION D – 5 scores each (any 2)
29.Three ways of heating/cooling atmosphere Radiation (solar & terrestrial), Conduction (ground warms lowest air), Convection (vertical currents).
30.Phenomena A & B (Chinook / Rain shadow) A: warm dry wind (Foehn/Chinook) descending leeward slope; B: rain shadow – dry area on leeward side.
31.Eastern vs Western coastal plains West: narrow, straight, few deltas, backwaters (Konkan/Malabar). East: broad, indented, large deltas (Mahanadi–Kaveri), Chilika lake.
32.Most widespread natural vegetation in India Tropical deciduous (monsoon) forests: rainfall 100‑200cm, shed leaves in dry season, teak/sal, commercial importance.
SECTION E – outline map (5 scores)
🗺️ 33. Identify & locate any four on India map:
- (a) Largest state – Rajasthan (north‑west)
- (b) Capital of Karnataka – Bengaluru (south, Deccan)
- (c) Coral island group – Lakshadweep (Arabian Sea, off Kerala)
- (d) Mountain range close to Arabian Sea – Western Ghats (along west coast)
- (e) River from Brahmagiri hills (Karnataka) – Kaveri (Cauvery)
- (f) Largest peninsular river – Godavari (flows east to Bay of Bengal)
✏️ Mark any four of these on the printed outline map.
🖼️ Question 30 (image based): A = Leveche/Chinook (warm, dry descending wind) , B = Rain shadow effect (dry leeward area). Differentiated by process (adiabatic warming vs. resultant dry region).