Desert Biome
Chapter 10: CHAPTER 10 · BIO ZOOLOGY · EN medium
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• Deserts cover about one fifth of the earth's surface and occur where rainfall is > mm/year. • Rainfall is usually very low and/or concentrated in short bursts between long rainless periods. Evaporation rates regularly exceed rainfall rates. • Soils are course-textured, shallow, rocky or gravely with good drainage and have no subsurface water. The finer dust and sand particles are blown elsewhere, leaving heavier pieces behind. Sand dunes are common. • Mean annual temperatures range from - °C. The extreme maximum ranges from . - ° C. Minimum temperatures sometimes drop to - °C. Based on the temperature range, deserts can be Hot deserts and Cold deserts.
📖 Class 12 Bio Zoology English 2024 Edition www.tntextbooks.in · Page 179
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• Deserts cover about one fifth of the earth's surface and occur where rainfall is > mm/year. • Rainfall is usually very low and/or concentrated in short bursts between long rainless periods. Evaporation rates regularly exceed rainfall rates. • Soils are course-textured, shallow, rocky or gravely with good drainage and have no subsurface water.
The finer dust and sand particles are blown elsewhere, leaving heavier pieces behind. Sand dunes are common. • Mean annual temperatures range from - °C. The extreme maximum ranges from .
- ° C. Minimum temperatures sometimes drop to - °C. Based on the temperature range, deserts can be Hot deserts and Cold deserts. • Hot deserts such as the Sahara of North Africa and the deserts of the southwestern
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