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

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)
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 – 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

✍ Manishika