Unit 7 Section A 1a-1c 课件2022-2023学年人教版八年级英语下册

Section A 1a-1c Unit 7 What's the highest mountain in the world? Qomolangma the Nile the Caspian Sea the Sahara Qomolangma runs between China and Nepal. It is covered with snow all the year round. It’s 8844.43 merers high, the highest in the world. The Nile is the longest river in the world. It’s more than 6600 kilometers long. It runs through 9 countries. The Caspian Sea is the deepest salt lake in the world. It's 1025 meters deep.It lies between Asia and Europe. The Sahara is the biggest desert in the world. It's about 9,600,000 square kilometers in size.It is located in the northern Africa Match the facts you know. 1a Qomolangma The Sahara The Caspian Sea The Nile a. about 9,600,000 square kilometers in size b.1,025 meters deep c.6,671 kilometers long d.8,844.43 meters high Let’s learn to read the numbers. In the world， when we write large numbers， we usually write 3 numbers a part，just like： 1,347,350,000 9,600,000 8,844.43 1,025 6,671 Do you know how to read them ? Can you read these numbers？ 7 1 6 7 1 6, 6 7 1 6 0 0, 0 0 0 9, 6 0 0, 0 0 0 1, 0 2 5 1, 3 4 7, 3 5 0, 0 0 0 hundred thousand million billion million thousand 0 . 1 3 . 14 4 . 43 zero point one three point one four four point four three Qomolangma 8,844.43 meters high. point (eight thousand eight hundred and forty-four point four three) Read small numbers Qomolangma 8,844.43 meters high The Sahara about 9,600,000 square kilometers in size The Caspian Sea 1,025 meters deep The Nile 6,671 kilometers long Can you tell the facts to your partner? Eg:1. Qomolangma is ___________ meters high. 2.The Sahara is about ____________ square kilometers in size. 3.The Caspian Sea is__________ meters deep. 4.The Nile is ____________ kilometers long. 8,844.43 9,600,000 1,025 6,671 1b Listen and complete the sentences. 1. Qomolan