Summary of three knowledge points in Geography elective for sophomore year

Learning does not depend on whether someone teaches you. The most important thing is whether you have awareness and perseverance. There are never shortcuts to learning, so climb to the top step by step. Study hard and work hard to make your youth more glorious. The following is a summary of the three knowledge points of the elective geography elective for high school sophomores that I compiled for you. I hope it can help you!

Summary of the three knowledge points of the elective geography elective for high school sophomores 1

1. Natural area boundaries

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(1) Natural regional boundaries within the eastern monsoon zone

① The boundary between the southern region and the northern region (the warm temperate humid region of North China and the humid region of Central China): Qinling ~ Huaihe River (January 0 ℃ isotherm, daily average temperature ≥ 10 ℃ accumulated temperature 4500 ℃ isotherm)

② The boundary between the humid and semi-humid areas in the Northeast temperate zone and the humid and semi-humid areas in the warm temperate zone of North China: the daily average temperature ≥ 10 ℃ accumulated temperature 3200℃ contour.

③The boundary between the humid area in Central China and the humid tropical area in South China: daily average temperature ≥10℃ and accumulated temperature 7500℃ isoline.

(2) The boundaries of natural areas within the arid and semi-arid regions of northwest China.

The boundary between the temperate grassland area of ??Inner Mongolia and the northwest temperate and warm temperate desert areas: the Helan Mountain line, which is equivalent to the 200 mm precipitation line.

2. Administrative district boundaries

(1) The boundary between southern and northern Xinjiang (the boundary between mobile dunes and fixed and semi-fixed dunes): Tianshan Mountains.

(2) The boundary between Hubei Province and Chongqing City: Wushan.

(3) The boundary between Fujian Province and Jiangxi Province: Wuyi Mountain.

(4) The boundary between Guangdong Province and Hunan Province: Nanling.

(5) The boundary between the Tibet Autonomous Region and the Xinjiang Uygur Autonomous Region: the Kunlun Mountains.

(6) The boundary between Gansu Province and Qinghai Province: Qilian Mountains.

(7) The boundary between Sichuan Province and Shaanxi Province: Daba Mountains.

3. Boundaries of three natural regions

(1) The boundary between the eastern monsoon zone and the northwest arid and semi-arid zone: the 400 mm constant precipitation line.

(2) The boundary between the Qinghai-Tibet alpine zone and the eastern monsoon zone: the 3000-meter contour.

(3) The boundary between the northern part of the Qinghai-Tibet alpine zone and the arid and semi-arid zone in northwest China: roughly runs from the Kunlun Mountains eastward through the Altun Mountains and the Qilian Mountains.

Summary of the three knowledge points of the sophomore geography elective elective 2

⑴Analysis of the urban location factors of Wuhan, my country:

Geographical location: located at the confluence of the Yangtze River and Han River; China The central part of the continent

Natural factors:

① Subtropical monsoon climate, sufficient heat, abundant precipitation, and rain and heat at the same time;

② Located in the plains of the middle and lower reaches of the Yangtze River, the terrain is flat ;

③The confluence of the Yangtze River and Han River facilitates the distribution and transfer of people and logistics.

Socioeconomic factors:

① Nearby iron ore and cotton resources;

② The confluence of the Yangtze River and the Han River, with the Beijing-Guangzhou Railway passing through, and convenient transportation; < /p>

③ Developed science and technology;

④ Abundant and high-quality labor force;

⑤ Capital city of Hubei Province, the economic and cultural center of Central China;

< p> ⑥Modern industry and emerging high-tech industries (Optics Valley).

(Main industrial sectors: steel, automobiles, cotton textiles, optical valley, etc.).

⑵The areas where the first cities were born: the alluvial plains of some of the world's largest rivers, such as the plains of the middle and lower reaches of the Yangtze and Yellow Rivers;

The plains of the middle and lower reaches of the Ganges, Indus, and Nile Rivers, etc.

Reason analysis: fertile soil and convenient irrigation conditions, developed agriculture; convenient water transportation.

Summary 3 of the three knowledge points of the high school geography elective elective

Our country’s important geographical boundaries:

⑴ The Qinling Mountains and the Huaihe River line is an important geographical dividing line in our country. There are great differences in the landscape between the north and the south of the line:

①The southern boundary of the Loess Plateau;

②Roughly passed by the 0℃ isotherm and 800mm precipitation line in January place;

③The boundary between the subtropical zone and the warm temperate zone;

④The boundary between the humid zone and the semi-humid zone;

⑤The subtropical evergreen broad-leaved forest and the temperate zone The boundaries of deciduous broad-leaved forest;

⑥The boundaries of rivers with and without ice periods;

⑦Agricultural paddy fields and dry lands, three-cropping systems in two years and two-cropping systems in one year, rice and The boundary between wheat and miscellaneous grains;

⑧The boundary between the Yangtze River water system and the Yellow River water system.

⑵ The Greater Khingan Mountains is also an important geographical dividing line in my country, and the landscapes on its east and west sides are also quite different:

① The place where the 400 mm precipitation line passes

②The boundary between the monsoon area and the non-monsoon area;

③The boundary between the inflow area and the outflow area;

④The place where pastoral areas and agricultural areas pass;

⑤The boundary between the Inner Mongolia Plateau and the Northeast Plain;

⑥The boundary between the second and third ladders of my country's terrain;

⑦The boundary between forest landscape and grassland landscape.

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