Question Q.7GS1GS2

Describe the nature and mode of origin of the main types of rock at the earth's crust. (10 marks, 150 words)

Main Body

Earth crust has three major types of rocks - Igneous, sedimentary and Metamorphic.

[Origin of Main types of Rocks]

Igneous Rocks → Origin from magma and lava. → the lava can be (acidic) or (basic) - define the characteristic of a rock. → (a) Acidic - granite, syenite. Basic - Basalt. → rock can be intrusive (forms inward the crust) or extrusive (cooling outside earth (ex Basalt))

Sedimentary → formed after igneous rock undergoes chemical or organic transformations. → occurs with fossils → in layers (bending).

Metamorphic → formed by dynamic or contact forced in the igneous/sedimentary rocks → result of thermal or pressure situation. → characteristics include foliation, banding. (2) Slate, Schist, Marble.

These rocks depict a cyclical nature in form of (ROCK CYCLE)

— DIVYA · AIR 182

125 words6 paragraphs

Examiner score

1.53/10

Open original scan

Page 15

Steal this copy's techniques PremiumAI pulls out the reusable moves — pick the ones you want as flashcards

Compare my answer PremiumSee where this topper beats you

Topper

DIVYA

AIR 1822025

Subject & Paper

GS1GS2

Topic

Geography - Geology

Rock Types and Formation

Types of Rocks and Rock Origin

Writing Stats

125

Total words

Paragraphs

descriptive-explanatory

Tone

Linked PYQ

1. अधोनिर्दिष्टानां विषयाणां पर्यालोचनं सोदाहरणं विधीयताम् (150 शब्दपरिमितम्) : 10×5=50 1.(a) कुमारसम्भवं कालिदासस्य कलायाः सुन्दरसृष्टिरस्ति । 10 1.(b) भगवद्गीतायां कर्मयोगमधिकृत्य एकां टिप्पणीं लिखत । 10 1.(c) नैषधीयचरितं कलापक्षपातिनां काव्यानां मुकुटमणिरस्ति । 10 1.(d) स्वप्नवासवदत्ते स्वप्नदृश्यस्य नाटकीय महत्त्वं प्रतिपादयत । 10 1.(e) वर्णकरप्रणीत- 'शिवराज्योदय'स्य शैलीसौन्दर्यं प्रपञ्चयत । 10

50M2015विधीयताम्