T: Let’s play guessing game: It’s very important to all the animals and plants. It’s also important to human beings. It’s liquid at room temperature. Every day you keep in touch with it. You can’t live without it. （a thing）
Step2. Warming up
T: Thank you for your ideas. Next we will make some interesting experiments. Maybe you can learn more about water from the following Experiments. Li lei , would you like to come here to help me ?
S:（班长）I’d love to----
T：Discuss 1 2 and 3 and try to answer the questions.
Ss: One shows how air pressure causes a piece of cardboard to ---
T: In our daily life , water can be used in different ways. Now we’ll talk about the ways in which water can be used . Look at the pictures on Page 18. The six pictures mean six different ways to use water . You can choose one of the pictures to dissuss the importance of using water and protecting our water, and then try to use some sentences to describe the picture you choose.
T: Who would like to talk something about the importance of using water? （学生纷纷举手） You two please.
S1: Water is important, because we use it to make electricity and drink every day.
S2: The water is being used for irrigating.
S3: Water can be used to transport goods.
S4: Water is important, because it can be used to wash every day.
S5: Water is important, because factories use a lot of water.----（回答的学生较集中，许多学生不参与活动。）