Unit 4Section 4Checking your progress课件 -2025-2026学年沪教版（2024）七年级英语上册

该初中英语课件围绕“地球保护”主题，通过塞罕坝生态转变案例、地球科学（空气与风）知识及实践项目，构建“思考-阅读-探究-实践”的学习支架，帮助学生衔接生态认知与跨学科应用。 其亮点在于以真实案例（如塞罕坝三代工人故事）渗透文化意识，通过讨论、项目制作（如毛乌素沙地等地点研究）提升语言能力与思维品质，跨学科连接地球科学拓展学习能力。学生能增强环保责任感，教师可依托结构化活动设计提升教学实效。

Unit 4 The Earth Checking your progress Section 4 Extending and developing competencies Focusing on culture Think What can we do to protect the Earth? Many people have worked hard to protect our beautiful planet.What challenges do they face?What achievements have they made? 1 Read the article about Saihanba and find out how the desert became a forest. Saihanba:turning desert into forest Saihanbais a forest park in the north of Hebe0 km 去那 from Beijing.For hundreds of years,the emperors went there to 在9世纪00年代 狩猎 hunt.But in the 1800s,things began to change.There were forest fires and wars,and people cut down many trees.Saihanba slowly turned into a desert. 砍伐 变成 在20世纪60年代早期 When the forest disappeared,there were terrible sandstorms in the Beijing area.In the early 1960s,a group of scientists travelled to Saihanba to find a solution.They found an old tree in the middle of the desert..Ma契wE鹅然济pantres here'they thought..In 1962,the first tree planters arrived in Saihanba.The cold and dry 到达 weather made their work very difficult,and strong winds blew away many young trees.In winter,it got as cold as-40C. blow away吹走 三代森林工人 Three generations of forest workers continued the hard work.Thanks to多亏 them,Saihanba is green again.It is today the world's biggest man-made forest.There are hundreds of millions of trees there.The forest helps 自都 provide the capital with clean water, and there are fewer sandstorms in the Beijing area now. 列为 In 2007,the government listed Saihanba as one of the most important national nature reserves in China.In 2017,the Saihanba Afforestation Community received the Champions of Notes the Earth award from the UN Environment Programme. 国家自然保护区 2 Answer the questions below with the information from the article on page 62. (1)How did Saihanba become a desert? There were forest fires and wars,and people cut down many trees. (2)Why was it difficult to turn the desert into a forest? The cold and dry weather made their work very difficult,and strong winds blew away many young trees.In winter,it got as cold as-40C. (3)How does the forest improve the environment in the Beijing area? The forest helps provide the capital with clean water,and there are fewer sandstorms in the Beijing area now. 3 Complete the sentences with the words and the phrase below. Change the form if necessary. blow away s generation hunt sandstorm solution (1)The family lived in the village for five generations before they moved to Beijing (2)This is a difficult problem,but I am sure we can find a solution (3)The strong wind blew away her hat,and it landed in the lake. (4) Sandstorms are very common in the Sahara Desert. (5)Killer whales usually hunt seals and sea lions for food. Your ideas 4 Discuss the questions below. (1)Why are forests important? (2)What can we do to protect them? Exploring more Have you been to Saihanba?Find out more about the place online. Cross-curricular connection Earth science Air surrounds the Earth.All living things on Earth need air to survive. What is air like? Read the poem about air and the text about wind.Then complete the sentences below. Air Air has no smell. How does that balloon, Air has no taste. Float in the sky? But when the wind blows, Well,it's simply hot air, You feel it on your face. That makes balloons fly! Look at that kite, 在那边Ve need air to breathe.生存， Or the plane over there. We need air to survive. How do they stay up待在And when we breathe it 活下来 They ride on the air. 上面It keeps us alive.