Unit 7 Know Our World（课件PPT）-【教材解读】八年级下册初二英语（冀教版）

初中英语冀教版八下 Unit 7 Know Our World Lesson 38: The World Is a Big Place! 1. Learn the new words and expressions in this lesson. 2. Learn some facts about seven continents in the world. 3. Learn to find the main idea of each paragraph. 4. Learn to love our world. 学习目标 Lead-in Ask and answer these questions with your partner. How many continents are there in the world? What are they? What do you know about the place where you live? Look at the picture. planet n. 行星 billion n. 十亿；千兆 total n. 总计；总数 adj. 总的；总计的 increase v. 增加；增大 Indian adj. 印度的 n. 印度人 Atlantic n.&adj. 大西洋（的） Arctic adj. 北极的 Learn Learn some new words How many continents and oceans does the world have? Can you point them out? Learn Learn the lesson. THINK ABOUT IT ·How many continents are there in the world? What are they? ·What do you know about the place where you live? 5 The earth is a very special planet, and it faces a big problem. In the year 2010, the world’s population was over 7 billion in total. It is increasing very quickly. By 2025, the world may have about 8 billion people. And by 2050, the world’s population may reach 9 billion. There is another problem. People can’t live everywhere on the earth. We can’t live in water, and only about one third of our planet is land. But parts of this land are very dry. These dry places are called deserts. Some areas have very high mountains. Others have a lot of snow and ice. It is not easy to live in those places. Learn Learn the lesson. 6 There are seven continents: Asia, Africa, Australia, Antarctica, Europe, North America and South America. Antarctica is covered with snow and ice all year round. Luckily, people can live on the other six continents. On these continents, there are green forests, fresh water and rich lands. Oceans cover two thirds of the earth's surface. The earth has only on