What Causes Soil Erosion（课件）高一时文阅读说明文适中

这是一份高一时文阅读同步教学课件，围绕“水土流失的成因”展开，包含Lead in、Pre-reading等六个模块。通过导入问题引发思考，阅读前视频（dr. Binocs Show）辅助，阅读中分析说明文语篇结构，配套细节与推理题，阅读后结合视频讨论预防措施，语言点聚焦词汇与长难句，作业为主题征文写作。 资料特色显著，注重核心素养培养。语言能力上，通过语篇分析、词汇练习和写作任务提升理解与表达；思维品质方面，习题设计引导分析推理，探讨成因与措施；融入视频资源增强学习兴趣，任务链衔接紧密。帮助高一学生适应高中阅读节奏，提升环保意识，也为教师提供完整教学方案，便于课堂实施。

What Causes Soil Erosion? 高一时文阅读 什么导致水土流失？ CONTENT 01 Lead in 02 Pre-reading 03 While-reading 04 Post-reading 05 Language Points 06 Homework Part 01 Lead in What causes soil erosion? What should we do to stop soil erosion? Part 02 Before-reading Part 03 While-reading 走进语篇 土壤侵蚀和岩石侵蚀一样，是由水、风和冰川的运动引起的。由于土壤对这些力的抵抗力较弱，土壤侵蚀往往比岩石侵蚀发生得更快。 ①Soil erosion, like rock erosion, is caused by the movement of water and wind, and glaciers. Since soil is less resistant to these forces, soil erosion tends to occur more rapidly than rock erosion. ②Water acts on soil, particularly through rainfall and surface runoff. When raindrops strike the soil’s surface, they break apart soil aggregates (that is, the clumps of dirt, sand, and other particles and components that make up the soil), making it easier for water to carry these particles away. This process, in which a thin layer of soil is removed uniformly across a large area, is known as sheet erosion. In other areas, water can carve small channels in the ground or larger channels which further accelerate soil loss. The impact of water-induced erosion is particularly pronounced in areas with steep slopes and heavy rainfall, where the force of water can quickly strip away the topsoil. ③Wind erosion is another major cause of soil erosion, especially in dry regions. It occurs when strong winds lift and transport loose soil particles over long distances. The process, known as saltation, involves smaller soil particles being lifted into the air and carried away by the wind, while larger particles are rolled along the ground. This type of erosion is exacerbated in areas with little vegetation cover, such as in environments characterized by sand dunes or other types of bare soil, since plants help to anchor the soil and reduce the wind’s ability to dislodge particles. Over time, wind erosion can lead to the formation of desert pavements, where only larger, more resistant particles remain on the surface. ④Human activities may also contribute to soil erosion by altering the natural landscape and removing vegetation cover. Agricultural practices, such as plowing and tilling, disturb the soil structure and make it more susceptible to wind and water. Deforestation, which involves the removal of trees and vegetation, also increases the risk of soil erosion by eliminating the root systems that stabilize the soil. Additionally, construction and urban development can lead to increased water runoff and soil compaction. These activities often result in accelerated rates of erosion, which can reduce the amount of topsoil available for agriculture and habitat for plants and animals. 语篇类型 语篇内容 语篇结构模式 段落大意 Part 1: 1 Part 2: 2-4 说明文 Soil erosion, like rock erosion, is caused by the movement of water and wind, and glaciers. General-special Introduction: It introduces what soil erosion is. It explains that the water, wind, and human activities have an effect on soil erosion. 牛刀小试 1. What is the main difference between soil erosion and rock erosion? A. Soil erosion is caused only by water, while rock erosion is caused by wind. B. Soil erosion happens more slowly than rock erosion. C. Soil erosion occurs more quickly than rock erosion. D. Rock erosion is only caused by glaciers, while soil erosion is caused by wind. C Soil erosion occurs more quickly than rock erosion. 由于土壤对这些力的抵抗力较弱，土壤侵蚀往往比岩石侵蚀发生得更快。 细节理解题 ① Since soil is less resistant to these forces, soil erosion tends to occur more rapidly than rock erosion. 2. In which type of environment is wind erosion most likely to occur? A. Rainforests with heavy vegetation. B. Dry regions with little plant cover. C. Mountainous areas with steep slopes. D. Wetlands with high water levels. ③ Wind erosion is another major cause of soil erosion, especially in dry regions. It occurs when strong winds lift and transport loose soil particles over long distances. B Dry regions with little plant cover. 风蚀是土壤侵蚀的另一个主要原因，特别是在干旱地区。当强风将松散的土壤颗粒抬升并远距离运输时，就会发生这种情况。 细节理解题 牛刀小试 ③ This type of erosion is exacerbated in areas with little vegetation cover…since plants help to anchor the soil and reduce the wind’s ability to dislodge particles. 牛刀小试 3. How does vegetation help prevent soil erosion? A. By increasing wind speed over the soil. B. By absorbing all the rainfall so water cannot move soil. C. By anchoring the soil with roots and reducing wind/water impact. D. By making the soil harder and more resistant to erosion. C By anchoring the soil with roots and reducing wind/water impact. 在植被覆盖较少的地区，这种类型的侵蚀会加剧……因为植物有助于固定土壤，降低风带走颗粒的能力。 推理判断题 4. Which human activity is NOT mentioned as a cause of soil erosion? A. Deforestation. B. Urban construction. C. Farming (plowing and tilling). D. Overfishing. ④ Human activities may also contribute to soil erosion by altering the natural landscape and removing vegetation cover. Agricultural practices, such as plowing and tilling…Deforestation…construction and urban development. D Overfishing. 人类活动也可能通过改变自然景观和移除植被来促进土壤侵蚀。耕作等农业活动……森林砍伐……建造和城市发展。 推理判断题 牛刀小试 Part 04 Post-reading Thinking Watch a video. Then talk: How to prevent soil erosion？ Thinking Watch a video. Then talk: How to prevent soil erosion？ measures Plant new trees Minimize the water use while planting vegetables Plant windbreaks …… Part 05 Language points 1. aggregate / ˈæɡrɪɡət/ 2. particle / ˈpɑːtɪk(ə)l/ 3. steep /stiːp/ 4. exacerbate /ɪɡˈzæsəbeɪt/ 5. bare /beə(r)/ 6. plow /plaʊ/ 7. susceptible /səˈseptəb(ə)l/ 8. construct /kənˈstrʌkt/ n. 总数，合计, 混凝料 n. 微粒；极少量；粒子 adj.（路、山等）陡峭的 v. 使恶化，使加剧 adj. 赤裸的；光秃秃的 v. 耕，犁；（用犁）挖出 adj. 易得病的，易受影响的 v. 建造，修建；组成 词汇聚焦 用方框中单词的正确形式填空 词汇练习 选词填空 aggregate, particle, steep, exacerbate, bare, plow, susceptible, construct 1. My next work was to _________________ a nest and anchor it in a tree. 2. _______________ physicists and astronomers collaborate often. 3. They won 4–2 on _______________. 4. Sure, you can use a mule to _____________ a field, it works. 5. The path led up a ______________ hill. 6. Climate change will only _______________ such pressures. 7. The hills above the valley are _____________ rock. 8. James was extremely_________________ to flattery. construct Particle aggregate plow steep exacerbate bare susceptible 长难句分析 Deforestation, which involves the removal of trees and vegetation, also increases the risk of soil erosion by eliminating the root systems that stabilize the soil.. 句子主干： Deforestation, also increases the risk of soil erosion by eliminating the root systems that stabilize the soil. 参考 译文 森林砍伐，包括砍伐树木和植被，也增加了土壤侵蚀的风险，因为它破坏了稳定土壤的根系。 主语 非限制性定语从句 谓语 Part 06 Homework 你校将举办一场征文活动，作文标题是：How to Prevent Soil Erosion? 内容要求如下： 1.介绍当下水土流失现象； 2.采取相应措施； 3.总结个人观点。 注意：1. 词数100左右；2．可以适当增加细节，以使行文连贯。 How to Prevent Soil Erosion? ____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ Homework 24 参考范文 How to Prevent Soil Erosion? Soil erosion has become a serious environmental issue worldwide. Due to deforestation, overgrazing, and improper farming, fertile soil is being washed or blown away, threatening agriculture and ecosystems. To address this, effective measures must be taken. Planting trees and grasses can stabilize soil with their roots. Building check dams can reduce water flow, while sustainable farming practices, like crop rotation, help maintain soil health. In my opinion, preventing soil erosion requires collective effort. Governments should enforce protective policies, and individuals must adopt eco-friendly habits. Only by working together can we preserve our precious soil for future generations. 25 Thank you for your listening Lavf58.20.100 Packed by Bilibili XCoder v2.0.2 $