NCERT Class 7 Geography Chapter 10: Life in Deserts Youtube Lecture Handouts

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NCERT Class 7 Geography

Chapter 10: Life in Deserts

Characteristics

  • Extreme High and Low Temperature

  • Scarce Vegetation

  • Low Rainfall

  • Types – Hot & Cold

Sahara (Hot Desert)

  • In N. Africa

  • World’s Largest Desert

  • Area – 8.54 Million Sq. Km.

  • 11 Nations – Algeria, Chad, Libya, Mali, Mauritania, Morocco, Niger, Sudan, Tunisia, W. Sahara

  • Sand, Plain Gravels, Elevated Plateaus

  • At one time it was lush green – Now climate changed

  • Highest Temperature – Al Aziza (Tripoli, Libya 57.7oC in 1922)

Sahara (Hot Desert)

  • Short rain

  • Cloudless and clear sky

  • Nights freezing cold with zero degree

  • Cactus, Date Palms & Acacia

  • Oasis – Water – Depression (Tafilalet Oasis – 13000 Sq. km.)

  • Camels, Hyena, Jackals, Fox, Scorpions, Snakes & Lizards

  • Oil – Algeria, Egypt & Libya

  • Iron, Phosphorous, Magnesium, Uranium

Nomadic Tribes

  • Bedouins & Tuaregs – Goats, Sheep, Camel, Horse

  • Milk, Hides (from leather for belts, slippers, bottles), Hari (Mats, Carpets, Blankets)

  • Settled Population

  • Water – Date Palms

  • Wheat, Rice, Barley, Beans

  • Egyptian Cotton

  • Act as guides for tourists

Ladakh (Cold Desert)

  • B/W Karakoram in North & Zanskar in South

  • Height – 3000 m in Kargil to 8000 m in Karakoram

  • Indus River

  • Gangri Glacier (Ladakh)

  • Cold & Dry Climate

  • Day (0oC) & Night (-30oC)

  • Freezing Winds (Frost Bite)

  • Hot Sunlight (Sunstroke)

  • Called Khapa-Chan (Snow Land)

Image of Ladakh (Cold Desert)

Image of Ladakh (Cold Desert)

Image of Ladakh (Cold Desert)

Ladakh (Cold Desert)

  • Sparse Vegetation – Willow & Poplar

  • Finest Cricket Bat – Willow Tree

  • Apple, Apricot, Walnuts

  • Birds – Robin, Redstarts, Tibetan Stopcock, Raven, Hoopoe, Migratory

  • Wild Goat, Wild Sheep, Yaks, Dogs – Milk, Meat & Hide

  • Yak – Milk – Cheese and Butter

  • Sheep & Goat – Hair – Woolens

  • Chiru – Tibetan Antelope (Endangered) – Wool Shahtoosh – Light & Warm

Ladakh (Cold Desert)

  • Muslims & Buddhists

  • Gompas – Buddhist Monasteries

  • Famous Monasteries – Hemis, Thiksey, Shey & Lamayuru

  • Summer – Barley, Potato, Beans, Peas & Turnip

  • Leh – Capital of Ladakh

  • NH 1A – Leh to Zojila Pass (Kashmir Valley)

  • Manali- Leh Highway (4 Passes – Rohtang La, Baralacha La, Lungalacha La & Tanglang La) – B/W July & September it is open