NCERT Class 11 Geography Part 1 Chapter 5: Minerals and Rocks YouTube Lecture Handouts

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NCERT Class 11 Geography Part 1 Chapter 5: Minerals and Rocks

Elements & Minerals

Table of Elements And Minerals of Minerals And Rocks

SL No.

Elements

By Weight(%)

1.

Oxygen

46.60

2.

Silicon

27.72

3.

Aluminium

8.13

4.

Iron

5.00

5.

Calcium

3.63

6.

Sodium

2.83

7.

Potassium

2.59

8.

Magnesium

2.09

9.

Others

1.41

Image of Elemnts And Mineralsof Minerals And Rocks

Image of Elemnts and Mineralsof Minerals and Rocks

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Physical Characteristics

  • External crystal form - arrangement

  • Cleavage – tendency to break

  • Fracture – irregular breaking of crystals

  • Lustre – appearance – metallic, silky

  • Color – due to impurities

  • Streak – color of ground powder (malachite is green & has green streak, fluorite is purple or green but has white streak)

  • Transparency – or translucent or opaque

  • Structure – fine, medium or coarse

  • Hardness – moh scale (1-talc and 10 is diamond)

  • Specific gravity - ratio between the weight of a given object and weight of an equal volume of water

6 Basic Minerals

Image of 6 Basic Minerals of Minerals And Rocks

Image of 6 Basic Minerals of Minerals and Rocks

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Minerals

  • Metallic – metal

  • Precious – gold, silver, platnium

  • Ferrous – Iron mixed to form steel

  • Non-ferrous – Cu, Pb, Zn, Sn, Al

  • Non-Metallic – no metal, sulphur, phosphate and nitrate - cement

Rocks

  • Aggregate of minerals

  • Granite (hard), soapstone (soft)

  • Gabbro (black), quartzite (white)

  • Petrology – science of rocks

  • Feldspar and Quartz are common rocks

  • 3 types – Igneous, Sedimentary & Metamorphic

Types of Rocks

Rock Cycle

Image of Rock Cycle For Minerals And Rocks

Image of Rock Cycle for Minerals and Rocks

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