LECTURE 09: DSSSB TGT AND PGT: GEOGRAPHY NCERT CLASS 8

Minerals
Definition: Minerals are naturally occurring substances that have a definite chemical composition. They are found in rocks.

Types:

Metallic Minerals: These minerals contain metal content, like iron, copper, and gold.

Non-Metallic Minerals: These do not contain metal content. Examples include limestone, mica, and gypsum.

Mineral Distribution
Global Distribution: Minerals are unevenly distributed around the world. Major producers include:

Iron: Brazil, China, Australia

Bauxite: Australia, China, Brazil

Copper: Chile, USA, Peru

India’s Mineral Distribution: India is rich in iron ore, bauxite, and mica.

Iron Ore: Odisha, Jharkhand, Chhattisgarh

Bauxite: Odisha, Gujarat, Jharkhand

Mica: Jharkhand, Bihar

Mining
Methods:

Open-Cast Mining: Minerals that lie at shallow depths are taken out by removing the surface layer.

Shaft Mining: Deep bores (called shafts) are made to reach mineral deposits that lie at great depths.

Impacts: Mining can have negative environmental impacts, including deforestation and contamination of water bodies.

Power Resources
Definition: Power resources provide the energy required for all industrial and domestic activities.

Types:

Conventional Sources: Include coal, petroleum, natural gas, and hydropower.

Non-Conventional Sources: Include solar, wind, geothermal, and tidal energy.

Conventional Power Resources
Coal: Formed from decayed plant material under high pressure and temperature over millions of years.

Petroleum: Found in sedimentary rocks and used to produce petrol, diesel, and other petrochemicals.

Natural Gas: Found along with petroleum deposits and used for cooking and generating electricity.

Hydropower: Generated by using the energy of flowing water to produce electricity.

Non-Conventional Power Resources
Solar Energy: Harnessed using solar panels.

Wind Energy: Generated by using wind turbines.

Geothermal Energy: Produced by using the heat from the Earth's interior.

Tidal Energy: Produced by harnessing the energy from sea tides.

Energy Conservation
Importance: It is vital to conserve energy resources to ensure their availability for future generations.

Methods: Includes using energy-efficient appliances, reducing wastage, and promoting the use of renewable energy sources.


TELEGRAM CHANNEL:- https://t.me/YKDEMY_OSS
WHATSAPP - https://wa.me/message/OHD3TGRHNSTJB1

#DSSSB #TGTExam #ExamPreparation #TeachingExams #StudyGuide #MockTests #SyllabusCoverage #Education #TeachingCareer #TGT2024 #StudyTips #emrs #emrs2024 #emrsnewupdate #emrstgtsst #DSSSBTGT2024​ #DSSSB​ #dsssbtgtsst ​ #DSSSBTGT​ #DSSSBVacancy2024​ #dsssbtgt​ #dsssbsyllabus2024