Unit 7 Whats the highest mountain in the world?Section A 1 1a 2d教学目标：1语言目标：掌握本单元重点词汇及能用比较级和最高级谈论各之最。2 技能目标：能听懂和谈论有关地理和自然的话题。3 情感目标：培养学生热爱大自然，保护环境的意识。教学重点：短语: in size, in the world, 2 meters tall/long/wide, the biggest population, one of the biggest, the most popular question, talk about, the ancient emperors, the main reason, as far as I know, no man-made objects, 教学难点：形容词和副词的比较级和最高级变化规则和用法。 物体之间的对比。Step 1 Presentationsquare meter deep desert population population Asia tour tourist wall amazing ancient wide Step 2 Warming-up1. Watch the photos and talk about them “How big/high/long/big is ? and help the students to answer: Its meters/kilometers/cm big/high/long/big.2. Look these photos and practice the dialogue:e.g. A: How high is Qomolangma?B: Its 8,844 meters high.Step 3 1a Match the facts you know.Practice in pairs using the information in 1a.Qomolangma about 9,600,000 square kilometers in sizeThe Sahara1,025 meters deepThe Caspian Sea6,671 kilometers longThe Nile8,844.43 meters highStep 4 Explaination8,844 meters high. 8,844米高 英语表示“有多长（宽，高）”时，一般将数词和数量单位放在表示长宽高的形容词前作状语。e.g. The wall is 1.7 metres wide.Step 5 Listening 1. 1b Listen and complete the sentences.1) Qomolangma is _ than any other mountain in the world. 2) The Sahara is _ desert in the world.3) The Caspian Sea is _ of all the salt lakes.4) The Nile is _ river in the world.2. 2a Listen and number the facts(1- 4) in the order you hear them.2b Listen again and fill in the blanks in 2a with the numbers in the box.Step 6 Practice 1c Make conversations in pairs.Examples A: Did you know that China if one of the oldest countries in the world?B: Yes, I did. Its much older than my country.Step 7 2d Read the conversation and answer the questions:1) Which is the biggest man-made objects in the world？2) Which is the most famous part of the Ming Great Wall?Step 8Test 填空 6,300 5,000 5,464 3001.The Yangtze River is about _ kilometers long and the Yellow River is _ kilometers long.2. China has the biggest population in the world. Its a lot bigger than the population of the US.3.China is over _ years old. It has a much longer history than the US. The US is not even _ years old.4.China is almost as big as the US, but it is the biggest country in Asia.Step 9 Homework A: To memorize the important phrases and sentences.B: to make some dialogues about asking the size of objects.教后记: