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1、Unit 13 The Properties of WaterTeaching goals:1. Talk about water and the ocean2. Practice communicative skills3. Review Modal Verbs4. Write an explanation paragraphTeaching Plan: (Six Periods)1st period: Warming-up and Reading (1)2nd period: Reading (2)3rd period: post-reading and Listening (SB)4th
2、 period: Integrating Skills (SB)5th period: Speaking6th period: Grammar and Language Study第1页共17页Period 1 Warming up & Reading (I)Teaching goals: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 enabl
3、e them to be aware of the importance of water, making good use of water in a proper way and protecting water resources.Important points in teaching:Words: benefit, available, pure, mass, float, absorb, release, stable, bottom, habitat, dissolve, property.Phrases:benefit from, range from ., allto the
4、 way, be made up of, that is, freezing point, break down, mix with, be measured in, take advantage of, keep steady, manage to, be sensitive to, up to.Structures: whatever ., ., that is, .Teaching procedures:Step1: Lead inRead a short poem and guess its name: A letter from _. (Water)Dear User,Shame t
5、o you all, the Ignorant,I am your lifeBut you seem not to value meGive me all the respectFor in me is eternal lifeIf you continue abusing meSurely, all forms of life will wither awayHave you ever imagined,Life without me?I tell you, it will be unbearableThink twiceFor every drop counts.Qs: 1) What d
6、oes“ Dear user ” here refer to?2) What does it talk 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 wo
7、rds as possible related to waterQs:.? How much do you know about water? Is all water fresh or salty?第2页共17页waterStep3: Talk about the properties of water.1. Pair workT:Water is around us and inside us. We can t go withoutQs: water.? Why is water so important to living things? Can you point out some
8、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
9、 of every living organism on the planet; etc.Properties2. Group workLearn more about water s properties by doing some simple experiments and learnto describe an experiment.What property of water does each of the four experiments illustrate?What causes this phenomenon?What s this phenomenon related t
10、o? 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
11、 illustrates some of the differences between salt water and fresh water.第3页共17页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 coas
12、tal areas are often neither too hot nor too cold. Why can some living things live at the bottom of the ocean where there isno sunshine?(If these questions are too difficult ) Try asking questions about the properties of water and then give answers to them.Step4: Pre-readingLook at the titles in the
13、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 _ look like?What are different parts of _?What can _ be compared to?How does _ work?What are some examples of _?1. Skim to f
14、ind the words and phrases which describe the properties of water in the reading text.2. Scan to Find out some basic facts about life in the oceans.Life on earth began in the oceans about three billion years ago; 99% of the living space on earth is in the oceans;There are about five million (known) species in the oceans; Life in the oceans ranges from tiny plankton to giant whales.Step5: Homewo
