Sec 1 Exp - Desert
- 10. Can you write down of the characteristics of a desert.
- 13. Desert Rainfall Less than 250 mm Low humidity (dry) Temperature -30 0 c to 48 0 C
- 14. 2 types of deserts Hot Found in tropical regions Sahara Kalahari Cold (Tundra) Found in temperate regions Gobi Mojave
- 15. Location of hot desert
- 18. What is so special about the vegetation in the desert?
- 23. Characteristics of hot desert vegetation Vegetation grow far apart and sparse Because of low rainfall Fleshy stems or swollen roots To store water Small or no leaves To reduce the loss of water Short life cycle Seeds buried for months or years to survive the harsh climate When rain falls, the seeds quickly grow into plants and produce new seeds The seeds are scattered and remain in the ground until the rain comes again
- 24. Tundra (Finnish) means barren or treeless land
- 32. Features of tundra Frozen layer of soil Rain in the form of snow During summer, ice on the top layer of soil melts provide moisture for the plants to grow Temperature rarely above 0 0 C Sparse Mainly consists mainly of lichens, mosses, tough grasses and scrubs
- 33. Characteristics of cold desert Vegetation is small and compact close to the ground To protect themselves from strong winds Vegetation has short roots Roots are not exposed and damaged by the extreme cold Small leaves To limit the loss of water through transpiration Short life cycle Where vegetation grow during the short summer.
- 34. Benefits of natural vegetation Natural resource
- 35. Benefits of natural vegetation Medicinal value
- 36. Benefits of natural vegetation Recreation
- 37. Benefits of natural vegetation Oxygen in the atmosphere
- 39. Benefits of natural vegetation Formation of rain
- 40. Benefits of natural vegetation Prevent soil erosion
- 42. Benefits of natural vegetation Natural habitats