Скачать или смотреть NCERT Class 11 Physical Geography Chapter 5: Minerals and Rocks | English | CBSE

In this video, Dr. Manishika Jain explains the NCERT Class 11 Geography Part 1 Chapter 5: Minerals and Rocks

Elements & Minerals
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
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

Elements & Minerals @0:13
Physical Characteristics @3:38
6 Basic Minerals @6:45
Minerals @8:30
Rocks @9:10
Types of Rocks @10:04
Rock Cycle @15:44
#Aggregate #Soapstone #Precious #Transparency #Translucent #External #Tendency #Cleavage #Appearance #Minerals #Manishika #Examrace

For details on IAS visit https://www.examrace.com/IAS/IAS-Flex...

For competitive exam preparation visit https://www.doorsteptutor.com/Exams/In this video, Dr. Manishika Jain explains the NCERT Class 11 Geography Part 1 Chapter 4: Distribution of Oceans & Continents

The video discusses continental drift theory, sea floor spreading and plate tectonics concept.

For details on IAS visit https://www.examrace.com/IAS/IAS-Flex...

For competitive exam preparation visit https://www.doorsteptutor.com/Exams/ #examrace #upsc #ugcnet