美國(guó)地理(英文版)The geography Of America課件

1、The Natural geographyOf Americacontent1.The United States territory range2. Position and area 3. Surface Regions and landforms 4. climate & weather5. Rivers & lakes6. Natural resources 7. Natural disasters8.The United States other conditions The United States territory range The United States on Jul

2、y 4, 1776, independent, rely on north American advantageous natural conditions and continuous outward expansion of its territory.1 And after a century of time capitalist economy of rapid development, now has a monopoly capitalism highly developed countries in the world today, is also abundant econom

3、ic strength and productivity level highly developed capitalist countries.The U.S. territory of expansion Position and area The United States of America, the abbreviation of the United States . U.S.A. The United States the country is divided into fifty states and a special economic zone, says Columbi

4、a, namely of District then to Washington, D.C. is located. 2 Among them there are 48 states in domestic, and two other overseas state, which is located in the north American continent northwest Alaska and is located in Alaska in the northern Pacific Ocean of Hawaii . The main part of the homeland in

5、 the central North America, the east coast in the west Pacific, Atlantic ocean, with 49 north latitude.Surface Regions and landforms U.S. land can be divided into seven main areas: (1) Appalachia； (2) the coastal lowland,；(3) Central Plains Region； (4) Ozark Mountains；(5) Rocky Mountains；(6) western

6、 grasslands, basin； (7) Pacific coast lowlands.3太平洋大西洋North and south tandem three landform 西部高山區(qū) 中部大平原東部高原山地120oW60oW climate & weather4 Native and Chinas latitude basic same, belong to the north temperate zone, reason climate and China also have similarities, in addition to coastal areas outside,

7、majority is in hot summer and cold winter of continental climate. The United States national the wettest place is Hawaii kauai wei, average annual rainfall. Drew up mount 11,700 millimeter. The dry, the hottest place is Californias death valley and the average annual rainfall is even less than 50 mi

8、llimeters, highest temperature was as high as 57 The U.S. minimum temperature records is - 62 , this is in January 1971 in Alaska prologis pie bay shy of the record. Rivers & lakes The Mississippi River is the main rivers, is also the largest river in North America, the Missouri river is the source,

9、 the span 6,262 kilometers, is one of the longest rivers in the world from Central America, the great plains it into the gulf of Mexico to the south. 5 It because the Missouri river yamuxing devotes herself, the Ohio river and size of more than 40 tributary, so abundant water quantity.密歇根湖蘇必利爾湖休倫湖伊利

10、湖安大略湖the worlds largest freshwater waters The GreatLakes is located in Canada and the United States border a few large-scale fresh water lakes, in addition to the lake Michigan belongs to the outside the United States, other it for Canada and the United States were. The five lakes composed of five g

11、reat lakes is the worlds largest freshwater waters, with a total area of 245660 square kilometers, has the America continent Mediterranean, said. 五大湖剖面示意圖 五大湖各水面高低不同，由西向東逐級(jí)降低，伊利湖與安大略湖之間的有將近100米的落差，并有一個(gè)斷層陡岸，從而形成了世界著名的尼亞加拉瀑布。尼亞加拉瀑布風(fēng)光 尼亞加拉瀑布分為南北兩段，北端呈半環(huán)狀，名馬蹄瀑布，屬加拿大；南端稱亞美利加瀑布，屬美國(guó)。美、加兩國(guó)均在瀑布之上修建了大型水電站。6.1

12、 Iron oreMain distribution: 1) the southwest area, the lake superior the region produces, accounted for iron ore three-quarters of the countrys total output. 2)s second-largest iron mine near Birmingham) located in Birmingham. 3) in upstate New York, Pennsylvania and the Tennessee river basin all ha

13、ve iron ore distribution.Landforms & Resourse6.2 Non-ferrous metal Main distribution: the southwest area of mountains and the rocky mountain Arizona, Utah, Montana, Nevada and new Mexico five states. Including Arizona copper ore production accounts for more than half of nationwide.Natural resources

14、distribution The United States is lead reserves and productions biggest countries for the reserves 5,350 tons of lead, accounting for 36% of world. Lead distributed in Missouri and the Rocky Mountains and the Appalachian mountains on both sides of the fourteen states.6.3 Oil U.S. oil resources for 3

15、8.88 proven reserves tons (1978), the worlds reserves of 4.5%. Americas oil region mainly distributed: the southwest and the gulf coast, and especially concentrated in Texas, Louisiana and Oklahoma three states. 6.4 Natural gas & water resources America is capitalist world the country with the most

16、natural gas output, but also consume most populous country. Therefore, still need to get gas from Canada and Mexico, and countries such as venezuela and Algeria in natural gas supply contract signed. U.S. natural gas production base, roughly and oil region mainly distributed in the Texas consistent,

17、 Oklahoma, California and in states such as Pennsylvania . In the United States, hydraulic power resource of resource utilization is poorer, hydraulic can provide the U.S. energy quantity is 4.4 percent.6.5 Coal 50 states have 36 states have coal resources for coal-fired power, about 50% of power is

18、 obtained by coal-fired power.Six major coalfield are: 1) east of the Appalachian coalfields, distribution of eight states in the east. And is the main production coking coal;2) the central plains of Chinas coal reserves is one of three points, but yield less, coal poorer;3) the rocky mountain west

19、coalfield, 4) northern coalfield; 5) the Pacific coast coalfield; 6) Alaska coalfield.6.6 Forest The us forest distribution, the comparative broad roughly a third of the land is forest belt, except for the central plains, west half the mountains outside the desert southwest of grassland and basicall

20、y, people with forest cover. The existing forest area, there are 240 million hectares is the origin of the commercial use wood, accounting for the entire two-thirds of the forest.Natural disasters The hurricane - such as Mexico coast in May to October each year from the attacks, to often agricultura

21、l causes great damage. 7 Forest resources main distribution: northwest XiYang coast, this one too YuanShiLin reserves of the national forest 90%, is the biggest commercial use wood to producing area. 2) the north and the south in the forest, forest primarily. 3) Alaska is also a potential forest region, where there are a lot of primitive forests, not cutting.Blizzard - in northern Rocky Mountains in winter cold season, also have attacks and blown over drivin