TAILIEUCHUNG - BIOMES OF THE EARTH - GRASSLANDS Part 10

Ở nhiệt độ không khí giảm theo độ cao ngày càng tăng phân 20-21 tháng ba và 22-ngày 23 tháng 9, khi mặt trời giữa trưa trực tiếp trên cao tại đường xích đạo và ngày đêm và có chiều dài bằng nhau ở khắp mọi nơi trong Estancia một thế giới Nam Mỹ. | GLOSSARY 243 ãS endotherm an animal that maintains a constant body core temperature by physiological means such as by dilating or contracting blood vessels in the skin shivering and sweating ENSO the full cycle of El Nino and its opposite La Nina associated with the SOUTHERN OSCILLATION environmental lapse rate the rate in degrees Fahrenheit or Celsius per 1 000 feet or per kilometer at which the atmospheric temperature decreases with increasing altitude equinox March 20-21 and September 22-23 when the noonday Sun is directly overhead at the equator and day and night are of equal length everywhere in the world estancia a South American cattle ranch estivation a period of dormancy into which an animal enters to escape a period of hot or dry weather ethanol ethyl alcohol CH3CH2OH the alcohol produced by the fermentation of sugar it is the alcohol used in biogas as well as in alcoholic drinks ethyl alcohol see ETHANOL exotherm see POIKILOTHERM Ferrel cell the midlatitude part of the general circulation of the atmosphere lying between the HADLEY CELL and POLAR CELL. Air rises at the boundary between tropical and polar air flows toward the equator at high altitude subsides in the subtropics and flows away from the equator at low level floret see INFLORESCENCE food chain a set of feeding relationships in which each in a sequence of organisms feeds on the preceding member food web a diagram that shows the inhabitants of an ECOSYSTEM linked by lines between species and the species on which they feed that is a series of FOOD CHAINS forb a herbaceous plant other than a grass forest limit see TREE LINE forest-steppe STEPPE grassland with scattered trees that borders the TAIGA front the boundary between two AIR MASSES funnel cloud a narrow funnel-shaped cloud that forms beneath a storm cloud if the funnel cloud touches the ground it becomes a TORNADO gametangium the organ in fungi mosses ferns and some ALGAE in which sex cells gametes are formed gamete a sex cell that is a .

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