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1、高二下英语：高二下英语：Unit 13 The Properties of Water 教案教案Unit 13 The Properties of Water Teaching Goals 1. Talk about water and the ocean. 2. Practice communicative skills. 3. Review Modal Verbs. 4. Write an explanation paragraph. The First Period Teaching Aims: 1. Learn and master the new words and the usef
2、ul expressions of this part. 2. Learn something about water by doing experiment. 3 Do some listening. 4. Improve the students speaking ability by talking. Teaching Important Points: 1. Make the students be free to talk about water. 2. Improve the students listening ability by listening. Teaching Dif
3、ficult Points: 1. How to finish the task of speaking. 2. How to improve the students listening ability. Teaching Methods: 1. Listening-and-answering activity to help the students go through with the listening material. 2. Individual, pair or group work to make every student work inclass. Teaching Ai
4、ds: 1. the multimedia 2. the blackboard 3. an empty glass, a bottle of water and a bottle of vegetable oil Teaching Procedures: Step 1 Greetings and Lead-in Read a short poem and guess its name: A letter from _. (Water) Dear User, Shame to you all, the Ignorant, I am your life But you seem not to va
5、lue me Give me all the respect For in me is eternal life If you continue abusing me Surely, all forms of life will wither away Have you ever imagined, Life without me? I tell you, it will be unbearable Think twice For every drop counts. Qs: 1) What does “Dear user” here refer to? 2) What does it tal
6、k to its users? 3)On which planet does it exist? On the earth, which is also called the water planet. 4) Do you know why it is called “The water planet”? Because about three quarters of the earth is covered by water. Step2: Pair work: Collect as many words as possible related to water. Qs: How much
7、do you know about water? Is all water fresh or salty? water Step3: Talk about the properties of water. 1. Pair work 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 vo
8、cabulary: 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
9、. Properties 2. Group work 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
10、causes a piece of thickpaper 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 bet
11、ween salt water and fresh water.3. T: What other properties of water do you know about? What causes the following phenomena? Can you explain? We can get a lot of nutrients by drinking water and having soup. Wood floats on water while iron sinks. The coastal areas are often neither too hot nor too co
12、ld. Why can some living things live at the bottom of the ocean where there is no sunshine? (If these questions are too difficult) Try asking questions about the properties of water and then give answers to them. Step5: Homework 1 Read the text carefully and find out the detailed information about wa
13、ter properties. 2 Think as many examples as possible to illustrate water properties. The Second Period Teaching Aims: 1. Learn and master the some new words and phrases. 2. Improve the students reading ability. 3. Enable the students to realize that it is important to protect thewater on our planet.
14、 Teaching Important Points: 1. Improve the students reading ability. 2. Master the following phrases: all the way, that is, mix with, take advantage of, manage to do Teaching Difficult Point: How do we make the students understand the reading passage better. Teaching Methods: 1. Discussion before re
15、ading to make the students interested in what they will learn. 2. Fast reading to get a general idea of the text. 3. Discussion after reading to make students understand what theyve learned better. 4. Careful reading to get the detailed information in the text. Teaching Aids: 1. the multimedia 2. th
16、e blackboard Teaching Procedures: Step 1 Greetings Step 2 Revision and Lead-in Ask someone to illustrate water properties. Step3: Pre-reading Look at the titles in the text below. Do not read the whole text. Pick out the subject of each paragraph. Use the structures below to make six questions related to the subjects. What is/ are _? What does _
