Lesson25Let’sDoanExperiment!

1、Look into Science,冀教版九年级,Lesson 25,Lets Do an Experiment!,Think about it! 1. What kinds of experiments have you done in science class? 2. If you hold a jar that is filled with water upside down, what will happen?,* Why does Danny say they should do this experiment outside? * What will Brian do? * Do

2、es Danny have the same theory as Brians?,Read the dialogue with the following questions.,Lets do it,Work in groups and think of this experiment. Discuss it and write down how we do it.,Step 1 Preparation: Make a list of the materials and tools that we will use in the experiment.,Water, a jar, a piec

3、e of cardboard.,Step 2 Theories: Write down two different theories. 1. The floor will get wet. 2.The floor wont get wet.,Step 3 Main steps: Write down the steps of doing the experiment. 1. Fill a jar with water. 2. Cover the top with a piece of cardboard. 3. Turn the jar upside down.,Step 4 Result:

4、Write down the result of the experiment. The force of air will keep the water in the jar.,How do we do the experiment? Lets do an interesting experiment. First, I _ a jar _ a desk, _ it _ water, then _the top _ a piece of cardboard. When I _the jar _ _, can you guess what will happen?,put,on,fill,wi

5、th,cover,with,turn,upside,down,Language points,1. I fill a jar with water. 我用水把瓶子装满。 fill with 用装满 He has filled his case with many books. 他已经把书装满了箱子。 coverwith 用盖住 I cover the top with a piece of cardboard.,2. I turn the jar upside down. 我把广口瓶倒置。,upside down 的意思是“向下翻转过来”。 You hold the book upside d

6、own. 你把书拿倒了。 right side up 是“正面朝上”的意思。,3. Im sure the floor wont get wet. 我确信地板不会湿。 be sure +that 从句表示“认为一定”。 而be not sure表示不确定。 eg. Im sure she will come here. 我确信她会来。 Im not sure when hell come here. 我不能肯定他什么时候来这儿。,4. Well do the experiment and observed what will happen. 我们将做这个实验并观察会发生什么情况。 observ

7、ed 动词, “观察” observe sb. do/ doing sth. 如： I observed her dance. When I passed by the grass, I observed him walking.,根据句意及首字母提示完成下列句子。 1. Do you often do e _ in your physics class? 2. Ill p _ that what he said is right. 3. He likes to read books about s _. 4. Mr. Smart sat in a corner and o _ what wa

8、s going on with this little aunt.,xperiments,rove,cience,bserved,选择与画线部分意思相同或相近的词。 1. Is the theory right or wrong? A. idea B. way C. mind D. answer 2. Dont turn the bottle upside down. A. away B. off C. up D. over 3. When I do the experiment, you must watch closely. A. learn B. know C. see D. observe 4. - Excuse me! May I ask you