高二英语下册Unit.doc

高二英语下册Unit 13 the Water PlanetWarming up & Speaking 湾里一中 邓敏Teaching Aims and Demands:1. To get the Ss to understand the main properties of water by connecting them with some common phenomena and learning to explain the phenomena.2. To enable them to be aware of the importance of water, making good use of water in a proper way and protecting water resources.Teaching Difficult Point:Talk about how to use water and protect it.Teaching important points:Make students be free to talk about water and improve their oral speaking ability.Teaching Aids:Some water, some oil and a glass; blackboard and multimediaTeaching Procedures:Step1.Lead-in 5mAsk the Ss some questions as follows T: Water is around us and inside us. We cant go without water. Qs:Why is water so important to living things? Can you point out some of its properties or characteristics? Suggested vocabulary: Its colorless, tasteless, odorless and universal dissolvent.It feels wet;It exists in three forms: liquid, solid, gas, and is cycled through the water cycle;It can absorb a large amount of heat;It sticks together into beads or drops;Its part of every living organism on the planet; etc. Ask students the names of Oceans and Continents: The Pacific Ocean, the Atlantic Ocean, the India Ocean, the Arctic Ocean; Asia, Africa, Europe, the North America, the South America, Antarctica, OceaniaStep2.Warming up use an experiment to show the properties of water15mUse the water, the oil and the glass to do three experiments. Learn more about waters properties by doing some simple experiments and learn to describe an experiment. What property of water does each of the four experiments illustrate? What causes this phenomenon?Whats this phenomenon related to? Experiment 1 shows how air pressure causes a piece of thick paper to cling to an upturned glass of water. Experiment 2 illustrates how substances with different density behave when placed in the same container. Experiment 3 is an example of how water dissolves substances and objects. Experiment 4 illustrates some of the differences between salt water and fresh water.Step3.Speaking 1. Pre-speaking 5m 1) Do you agree with the saying “Without water, life would not exist.”? 2) So not only you and I agree with this opinion, but also the United Nations hold the same view. And thats why we have World Water Day. Q: Is there anyone who knows when it is? Mar. 22 3) Brief background information about World Water Day: World Day for Water is established by the United Nations General Assemblys resolution 47/193 of 22 December 1992. It is a unique occasion to remind everybody that concrete efforts to provide clean drinking water and increase awareness world-wide of the problems and of the solutions, can help make the difference.2. While-speaking15m1) To some extent, the existence of World Water Day also implies that human beings cannot live without water. Why? Can you tell how water is being used in our life? Give some examples.Electricity, agriculture, home use, industry, transport, entertainment, etc. 2) Divide students into several groups with six in each. Each one takes charge of one picture. Group workWhen discussing each picture, please think about the following questions:How is water being used?What property of water enables it to be used in this way?Why do we use water in this way?Who benefits from using water in this way?Is this a good way to use water?What are some disadvantages of using water in this way?3) Each six-member group can be divided into three smaller ones with two in each. Pair workMake a dialogue on the basis of the results about your topics we reach, using following useful expressions:The water is being used to / for We should / could What will we do if ? If we , we can It would be better to Can you think of a better way Step 4. Summary and Homework 5mRecite the new words and expressions in this unit. After class, ask students to preview the Reading part.Layout on the blackboardUnit 13 The Water PlanetI. Why is water so important to living