科学——物质的世界（Science - the world of matter）.docVIP

科学——物质的世界（Science - the world of matter） Second unit material change 1, the material around us [teaching objectives]: Scientific concept: The world is made up of matter, the matter is changed, and the change of matter is the same and different. Some changes in matter produce new substances, and some changes do not produce new substances. Process and method: To compare, analyze and classify material changes by means of example, analysis, synthesis and generalization. Through specific experiments, to experience changes in material. Emotions, attitudes, values: the world is recognized as material and material is constantly changing. [teaching focus]: through specific experiments, to experience material changes. [teaching difficulties]: indirectly feel the existence of abstract substances and material changes. [teaching preparation]: Teacher: plastic bags, pop cans and water icing pictures Student: candles, matches, iron embroidery, nails and paper [teaching process]: First, to understand that the world is made up of matter 1, the introduction of the environment: To observe our surroundings, what constitutes our classroom? 2. Students speak freely (most of the objects are expected to be visible). The teacher points out that objects that we can observe directly can be called matter. 3, deep into the discussion: our classroom is not only the existence of these can see the touch of the material, and we can not directly feel the air, fire, sound, electricity, light, they are substances? 4. Propose a discussion and ask the students to list the evidence and the reasons. 5, teachers involved in the definition of abstract material: appropriate comments on the views of students, air samples necessary to prove the case, plastic bags proved. Expand the world beyond the material composition of the classroom. 6, summary: whether the actual existence of the material, or our sense organs can feel the material, it shows that the whole world is made of material. Two, the transition mate