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【教学目标】1.科学知识。知道光源发出的光向四面八方传播;理解光在空气或水、太空等环境中是沿直线传播;了解光是沿直线传播在生活中的应用。2.过程与方法。能有依据推测光的传播路径;能通过实验自行发现光传播的路线是沿直线传播,并加以验证。3.情感、态度和价值观。进一步养成与他人合作研究的习惯;在实验中能认真观察、勤于思考,根据实验结果实事求是地进行分析、推理。【教学重难点】光是沿直线传播;找出证实光是沿直线
【Teaching Objectives】 1. Scientific knowledge. Knowing that the light from a light source travels in all directions; Understanding light travels in a straight line in environments such as air or water, space; Understanding how light travels along a straight line in life. Process and method. There can be speculated that the light propagation path; can experimentally find the light propagation route is along a straight line, and to be verified. 3. Emotions, attitudes and values. Further develop the habit of collaborative research with others; in the experiment can be carefully observed, diligent in thinking, based on experimental results to analyze and reason in fact. Difficult teaching】 【light is spread along the straight line; find out that the light is confirmed along the straight line