Sahara Story三毛撒哈拉的故事
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• Believe it or not, deserts come in two varieties: hot and cold.
• Hot deserts
The main form of precipitation in a hot desert is rain. But that's only ten inches or less of rain per year.
e.g. Kalahari (Southwestern Africa) Sahara (Northern Africa)
• Cold deserts
The main form of precipitation in a cold desert is snow -- but only ten inches or less per year.
What is a Desert Like?
The desert is a land of extremes: extreme heat and extreme dryness; sudden flash floods and cold nights. Because deserts are such a harsh environment, deserts often have names likes "Death Valley“, "the empty quarter“, and "the place from where there is no return“.
E.g. Gobi (Northern China and Southern Mongolia) Great Basin (Western UBaidu Nhomakorabeaited States)
Life in deserts
• Deserts are the home to many living things. In fact, deserts are second only to tropical rainforests in the variety of plant and animal species that live there.
• Deserts are usually very, very dry. Even the wettest deserts get less than ten inches of precipitation a year.
• Hot During the Day, Cool at Night
Types of Deserts
Plants in desert
• How do you think plants grow in a place that is very, very dry?
• Many of the fascinating features of desert plants are adaptations -- traits that help the plant survive in its harsh environment. Desert plants have two main adaptations:
• Ability to collect and store water
• Features that reduce water loss
Snow on the Sahara
If your hopes scatter like the dust across your track I'll be the moon that shines on your path The sun may blind our eyes I'll pray the skies above For snow to fall on the Sahara If that's the only place where you can leave your doubts I'll hold you up and be your way out And if we burn away I'll pray the skies above For snow to fall on the Sahara …
• Hot deserts
The main form of precipitation in a hot desert is rain. But that's only ten inches or less of rain per year.
e.g. Kalahari (Southwestern Africa) Sahara (Northern Africa)
• Cold deserts
The main form of precipitation in a cold desert is snow -- but only ten inches or less per year.
What is a Desert Like?
The desert is a land of extremes: extreme heat and extreme dryness; sudden flash floods and cold nights. Because deserts are such a harsh environment, deserts often have names likes "Death Valley“, "the empty quarter“, and "the place from where there is no return“.
E.g. Gobi (Northern China and Southern Mongolia) Great Basin (Western UBaidu Nhomakorabeaited States)
Life in deserts
• Deserts are the home to many living things. In fact, deserts are second only to tropical rainforests in the variety of plant and animal species that live there.
• Deserts are usually very, very dry. Even the wettest deserts get less than ten inches of precipitation a year.
• Hot During the Day, Cool at Night
Types of Deserts
Plants in desert
• How do you think plants grow in a place that is very, very dry?
• Many of the fascinating features of desert plants are adaptations -- traits that help the plant survive in its harsh environment. Desert plants have two main adaptations:
• Ability to collect and store water
• Features that reduce water loss
Snow on the Sahara
If your hopes scatter like the dust across your track I'll be the moon that shines on your path The sun may blind our eyes I'll pray the skies above For snow to fall on the Sahara If that's the only place where you can leave your doubts I'll hold you up and be your way out And if we burn away I'll pray the skies above For snow to fall on the Sahara …