(
课件网) Unit 5 Water is life 主题范畴： 人与自然 主题群： 环境保护 子主题： 环境污染及原因，环保意识和行为 Key question What does water mean to us Improve my listening comprehension skills by predicting key words and content before listening; Identify and understand important details in the spoken text about water, such as “drinkable”, “undrinkable” and “surface”; Raise awareness about the importance of saving water by discussing ways to use water wisely. Learning objectives 学习目标 At the end of the class, I’ll be able to: New words and phrase bath /bɑ:θ/ n. 洗澡；洗浴 salt /s :lt/ adj. 含盐的；咸的 brain /bre n/ n. 脑 drinking water 饮用水 Warm-up A quiz about water Section 1 Experiencing and understanding language 1. The World Water Day is on ____. a. March 22nd b. March 12th c. May 22nd 2. Water covers almost ____ of the Earth. a. 1/4 b. 1/2 c. 3/4 3. Water makes up about ____ of the human body. a. 80% b. 60% c. 40% 4. One gallon (加仑) of water is the same as ____ litres (升) of water. a. 1 b. 3.785 c. 2.785 drinkable undrinkable 词根助记：-able 能够的； un- 否定前缀 1. Look at the pictures and learn the words and phrases. The water on the left is _____, while that on the right is _____. undrinkable drinkable bath / take a bath shower / take a shower Can you tell me which one you prefer, a bath or a shower Why tap drinking water surface / s f s/ n. 表面 Pre-listening Predict the possible answers to the following questions. What percentage of the Earth’s surface is water Is the majority of the water on Earth fresh water or salt water What role does water play in the human body While-listening 2. Listen to a podcast about water and write down the topics mentioned in it. 1 _____ 2 _____ 3 _____ The water on Earth The water in the human body Ways to save water 3. Listen again and complete the notes below. 70 3 97 0.5 60 75 a few days 2 to 3 wash clothes and take baths Tapescript Post-listening Good evening and welcome to this week’s episode of The Natural World. I’m Rebecca, and tonight we’ll be talking about water. About 70% of the Earth’s surface is covered by water, but 97% of it is salt water, which is not drinkable. Only about 3% of the water on Earth is fresh water, and most of that is locked up in ice. So, only about half a percent of Earth’s water is usable for drinking. Clean and safe drinking water is hard to find in many places. usable 可用的；unusable 不可用的 useful 有用的；useless 无用的 be covered by 被……覆盖 Water is essential because most of the human body is made of water — around 60% in an average adult. Some parts of the body contain even more, like the brain, which is about 75% water. While humans can survive for weeks without food, we can only live a few days without water. We need around 2 to 3 litres of water per day, and athletes usually need more. In hot weather, people also require more water. essential 重要的 = important require sth. 寻求某物 ... ...
