(
课件网) Unit 5 Water is life Lesson 2 Listening 英语沪教版（2024）七年级下册 Learning objectives 目录页标题 通过本课时学习，学生能够： 1. 通过听力获取与水相关的信息和数据，并积累相关语言知识。 2. 理解语篇中列数字的作用。 3. 能够运用所学知识谈论地球上的水资源情况，水的重要性和节约用水的方法。 4. 了解目前水资源存在的危机，进一步讨论如何保护和节约水资源，增强爱护水源，拒绝浪费的节水意识。 重点 重点 Think and choose Water covers about ____ of the Earth’s surface. A. 1/4 B. 1/2 C. 3/4 Watch and answer Water covers about 70% of the Earth’s surface. Why do people suffer water shortage Although water covers about 70% of the Earth’s surface, most of it is salt water, which is undrinkable. Only 3% of Earth’s water is fresh water and most of it is in the glacier or the permafrost layer (永久冻土层). People can use less than 1% of fresh water as drinking water. Let’s find out more facts about water! Listen and write 1. _____ 2. _____ 3. _____ The water on Earth The water in the human body Ways to save water Listen to a podcast about water and write down the topics mentioned in it. Listen and complete 70 3 97 0.5 60 75 a few days 2 to 3 wash clothes and take baths percent half a percent / zero point five percent Listen and answer What can people do to save water They can have a quick shower instead of taking a bath. They can turn off the tap when they brush their teeth as well! Read and answer Why does the speaker use so many numbers in the text 1. To make the information more trustworthy and scientific. 2. To help explain complicated ideas with clear numbers and make it easy for people to understand how small actions can make a big difference. Good evening and welcome to this week’s episode of The Natural World. I’m Rebecca. Tonight we will be talking about water. About 70% of the Earth’s surface is water. However, about 97% of the water on Earth is salt water. Salt water is not drinkable. Only about 3% of the water on our planet is fresh water, but most of it is ice. So, how much of the water can we use as drinking water Only about half a percent! And in many places, clean and safe drinking water is not easy to find. Why is water so important Well, most of the human body is water: around 60% in an average adult man. There is more water in some parts of the body. For example, about 75% of the brain is water. People can live for several weeks without food, but only for a few days without water. Human beings need around two to three litres of water per day. Athletes usually need more water. When it is hot outside, people need more water too. But people use a lot more water for other things, such as washing clothes and taking baths. There are many ways to save water. Having a bath can waste a lot of water, so it’s better to have a quick shower. Also, remember to turn off the tap when you brush your teeth. That way, you can save over a hundred litres of water in a week! Talk in groups Q1: Why shou ... ...
