"Soil" Vegetation and Soil PPT

"Soil" Vegetation and Soil PPT

Part One Content: Learning Objectives:

1. Observe and understand the composition and characteristics of soil.

2. Master and understand the main formation factors of soil. (emphasis)

3. Understand the functions of soil and common maintenance measures. (important and difficult points)

Soil PPT, part 2: independent preview to explore new knowledge

1. Observe the soil

1. Soil concept: The land surface has a certain ______ and is a loose surface layer capable of growing ______.

2. Material composition: minerals, ______, water and ______.

3． Field observation content:

(1) Soil color: Black soil, red soil, etc. are named after their colors.

(2)Soil texture:

According to the proportion of minerals of different particle sizes in the soil, it can be divided into the following three types:

①Sandy soil: It has strong ventilation and water permeability, weak fertilizer retention performance, and is easy to ______.

② Loam: It has strong water storage and fertilizer retention properties, and is an ideal soil texture for ______.

③Clay soil: It has ventilation and water permeability ______, and has good fertilizer retention properties, but its texture is ______ and difficult to cultivate.

2. Main factors forming soil

1. Soil-forming parent material: It is the material basis for soil development, determines the composition and nutrient status of soil minerals, and affects the texture of soil.

2. Biology: The most ______ and most ______ factor affecting soil development. Provides ______ to the soil and enriches nutrients in the surface layer through ______.

3． Climate: (1) The ______ and ______ of rock weathering are ______ with temperature and precipitation.

(2) The distribution pattern of climate affects and controls the distribution pattern of ______.

4． Landform: affects the development of soil in many ways.

5. Time: The longer the time, the more obvious the soil layer ______ and ______.

6． Human activities: The impact is extremely profound.

[Special Reminder]

1Soil is the product of the comprehensive interaction of various environmental factors.

2The soil in wetland areas develops quickly but is often poor.

3. Soil functions and maintenance

1. Function

(1) It connects the four major circles and is the key link between _______ and _______.

(2) It provides conditions for _______ to take root and establish itself and changes the geographical environment.

(3) It has important _______ and _______ functions.

(4) It is a precious _______ that humans can use.

2. Use and protect

(1) Improve or transform soil that cannot meet farming needs.

(2) For good soil, we should pay attention to the combination of _____ to maintain the soil's ability to continue to provide ___________.

Soil PPT, Part 3: Collaborative exploration to overcome difficult problems

soil forming factors

The Northeast region is commonly known as black soil. The main reason is that it is distributed with typical black soil. People often say that on black soil, "oil flowers bloom when you pinch the black soil, and sprouts sprout even when you insert a pair of chopsticks." Black soil is a unique treasure given to mankind by nature. It is a kind of soil with good properties, high fertility and very suitable for plant growth. There are only three black soil plains in the world: the Mississippi Plain in America, the Ukrainian Plain in Europe, and the Northeast Plain in Asia.

Question 1 (Comprehensive thinking) What is the main reason for the fertile black soil?

Tip: Black soil is rich in organic matter and has high fertility.

Question 2 (Comprehensive thinking) In what climate environment did black soil develop and form?

Tip: Black soil is distributed in areas with higher latitudes, indicating that it developed in a cold and humid environment.

Question 3 (Regional Awareness) The hot and humid areas in southern my country have dense vegetation, but the soil they develop has low organic matter content and is relatively poor. What is the main reason?

Tip: The climate in southern my country is hot and humid, with more precipitation. The leaching effect of the soil is strong, and the organic matter content in the soil is low and relatively barren.

Question 4 (View of Man-land Coordination) The black soil distribution area in Northeast my country is currently experiencing a decrease in black soil fertility. How should we maintain it?

Tips: You can maintain it by means of fallowing, crop rotation, returning straw to the field, adding organic fertilizer, etc.

[Summary] Analysis of the main formation factors of soil

The formation of soil is influenced by natural factors such as soil parent material, biology, climate, topography, and human activities. It reflects the interaction and mutual influence of natural geographical environment factors, and together form a whole.

Soil PPT, the fourth part: Competing quality standards and solidifying the foundation

1. Among the soils in the following climate types, the one with the deepest weathering crust is ()

A. Tropical rainforest climate B. subtropical monsoon climate

C. Temperate oceanic climate D. Mediterranean climate

A [Among the soils under various climate types, the one with the deepest weathering crust is the tropical rainforest climate. The high temperature and rainy environment has strong leaching effect, which is conducive to the weathering and development of rock formations, and the weathering layer is deep. ]

2. Among the following soil-forming factors, the ones that mainly act on soil indirectly through the redistribution of material and energy are ()

A. Terrain b. climate

C. biology d. Soil-forming parent material

A. The hydrothermal conditions in the climate directly affect the content of organic matter in the soil and the thickness of the weathering crust. Biology is the source of soil organic matter. The production of soil fertility is closely related to biological effects. The soil-forming parent material is the initial state of the soil and is The material basis of soil formation, which directly affects the formation of soil. Gentle slopes accept sedimentation, while steep slopes are dominated by erosion, which affects soil thickness; windward slopes and leeward slopes affect precipitation in different slope directions, and sunny slopes and shady slopes affect the light and heat conditions in different slope directions, thereby affecting the water in the soil. Thermal conditions, therefore act indirectly on the soil. ]

Keywords: PPT courseware for high school geography compulsory course 1 from the People's Education Press is available for free download, soil PPT download, vegetation and soil PPT download, .PPT format;

For more information about the "Soil, Vegetation and Soil" PPT courseware, please click on the Soil PPT Vegetation and Soil PPT tab.

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