2.2 distance against time graphs(速率时间图像).doc

LESSON PLAN Course: PHYSICS Grade Level: Grade one/two Teacher:林华平 Date: Title: Distance against time graphs Content: Distance against time graphs PRE-LESSON PLANNING Learning Objectives To introduce the definitions of gradient of distance against time graphs. To interpreting distance against time graphs. Design the Assessment: Several related questions are prepared to evaluate the students. To practice the distance against time graphs. Design Assessment Rubric (if Needed) TEACHING THE LESSON Vocabulary: slope [sl??p] 倾斜；斜率 gradient [gre?d??nt] 梯度；坡度；倾斜度 stationary [ste??(?)n(?)r?] 固定的；静止的 ；静止 flat [fl?t] 平坦的；扁平的 curve [k??v] 曲线；弯曲 ；弯曲的；曲线形的 ratio [re?????] 比率，比例 section [sek?(?)n] 部分；节 sketch [sket?] 草图；略图；素描 plot [pl?t] 绘图 horizontal [h?r?z?nt(?)l] 水平线，水平面；水平的；横向 vertical [v??t?k(?)l] 垂直线，垂直的，垂直 journey [d???n?] 行程 Materials: Procedure: Presentation Show the picture. -What is the meaning of this sign? -What does the 7% mean? Vocabulary Read the key words together. Gradient Step1: Introduce the definition of gradient. Gradient is the ratio of the vertical rise to the horizontal run between any two points on a line. Step2: Determine the slope of the line. Start with the lower point and count how much you rise and run to get to the other point! Notice the slope is positive AND the line increases! Speed = Slope = Rise/Run Different distance against time graphs Step1:Discuss the distance against time graphs. The gradient of the graph tells us that the object is not moving. The gradient of the graph tells us that the object is moving at constant speed. The gradient of each graph tell us that the yellow object is moving faster than the blue object. The slopes of each tangent line on the graph tell us that the object is moving faster. Step4: Explain the examples. Exercise Do some exercises to practice the distance against time graphs. -Show the picture and answer the questions. : questions 8 Summary Assignment Finish the works