把固体放进水里说课稿(国外英文资料).docVIP

把固体放进水里说课稿(国外英文资料) Question: which is not the same as your guess? What did you think? What new ideas are there now? The students will be observed in the experimental process many unlike speculation phenomenon and some unexpected discoveries, these will cause the students thinking, with the original cognitive conflict. (2) the second part: recognizing different mass or volume of the same object in the ups and downs in the water, establish the correct concept of the ups and downs, and its material and shape of the object to know about. The experiment proves that some of your ideas were inaccurate and one-sided. So what kind of object would sink in the water, and what would float in the water? What is related to? 2, whats the difference between the first group and the second? What happens if you put them in water? 3, the student group experiment, the teacher patrols the instruction. What new discoveries have you made this time? The students will find that the same object, though different in size, is both floating and heavy. Look closely at the object in the sink and think: what is the objects ups and downs about? Guide the student to find out about the material. Theres a piece of dough in the sink, and you squeeze it into a bowl and you put it in the water and see what happens in the water? 8, the student group experiment, report the result of the experiment, it is the composed silly putty float up. Question: the shape of the dough is floating in a bowl. What does this mean? Lead students to discover and shape relationships. [in students, on the basis of full discussion further trigger the students cognitive conflict, and then through the experiment to make the students realized that heavy objects not heavy, light things dont float, correcting students mistakes. On this basis to establish the correct concept, object of ups and downs and relevant materials and shapes. (3) to learn more about the secrets of the ups and downs, knowing that the big things are easy to flo