carried out \ce line pioneer standard, and post spurs\service months\de members always everywhere bearing in mind identity, based job post, active play role. To develop differentiated learning education guide party members in accordance with their own situation, target the problems to, based on the work done. Pay attention to the room and room for grass-roots party organizations, grass-roots party organizations have more autonomy in education, making education more ground, full of vitality, good effect. Finally, highlight the normal long-term. To highlight the characteristics of recurrent education, with long flowing, continuous line of perseverance the perseverance to promote educational efforts to realize the party's ideological and political construction of routine institutionalization. With the party branch as the base unit. Play the role of party brnches should be, is the key to educational success. Each branch must take stricteducation and management responsibility of party members, education based on learning to make specific arrangements, fully mobilize the enthusiasm of party members involved in the education, ensure the Organization in place, measures in place, put in place. To the party organization as the basic form. In the standardized development of learning, make learning more effective efforts, and will adhere to the good party group, organized party, party members and the General Assembly, tell a good party lectures, can drive a good topic about, prevent showy without substance, Sham mules. To implement the education management system for basic support. Democratic mutual evaluation on party members in accordance with the regulations, the real performance criteria and order established, sound carefully dispose of unqualified party members, to further improve the dredge export team, pure self cleaning mechanism. Party leading cadres should adhere to and implement the central group learning system, to which branch of learning exchanges, participation in a dual organization with comrades. Focus on recurrent education, you also need to continue to strengthen the building of grass-roots party organizations. Now, the city also has 88 village party organizations are weak and lax, first Secretary of the village, but conversion requires a process. Recently, the city's party organization focused investigation, check out a total of \here are 640 \are not contacted 148 \nd implementation of organizational relationships. Educational management of party members into the Organization, there is a lot of work to do. Weak and lax party continued reorganization as an important task, finish perfect organization, with a good team, Good system. Special highlights of grass-roots party organizations, to be dealt with first in place, further education, reorganization, transformation and educationalinteraction. In short, through solid and effective work initiatives的环境里，会运动，需要食物维持生命，会排泄废物，会对外界刺激做出反应，会生长发育，会繁殖后代。 过程与方法
运用比较的方法获得动物的共同特征。 情感、态度、价值观
通过对动物寿命的认识，懂得生命的可贵，也体会生死的自然规律。
【教学重点】整理已经观察、分析、和研究的结果，进行概括和总结，共同的除动物的共同特征。
【教学难点】学生提供的信息是否有证据支持，学生无证据信息对整理的干扰。 【教学准备】蜗牛、蚯蚓、蚂蚁、金羽的图片；四种动物议政的图片。 【教学过程】
一、讨论动物的共同特点。
1、学生整理本单元的学习成果。
2、小组讨论四种小动物的共同特点，把结果记在课本上。 3、汇报，教师把汇报结果记在黑板上。
4、教师或学生举例某种动物，看是否具有上面的共同特点，如果某一种动物不具备上面四种动物的某个共同特点就删去，这样找出动物的共同特点。 5、关注：学生交流的信息是否有证据支持。 6、设计意图：了解动物所具有的共同特征。 二、感受生物的多样性
1、教师讲解到校园观察学校动物和植物的注意事项。 2、学生分组到校园静静的观察校园的植物和动物。 3、回教室汇报。
4、关注：是否能做到安静的观察、不打扰校园的动植物。 5、设计意图：学生体会生物的多样性。 三、总结生物的共同点
1、全班集体用维恩图比较动物和植物有什么相同和不同。
2、在动物和植物相同的圈里写上“生物”两个字，并告诉学生，动物和植物艘是生物，都是有生命的物体。 3、关注：学生在过程中提出的问题。 4、设计意图：理解什么是生物。
四、讨论人与其他动物、植物的共同特点 1、教师指着动物、植物的共同点问：“人有这些特点吗？”
2、归纳小结：人和动物、植物都是生物，都是活的，生活在一定的环境里，会生长繁殖、最后都会死亡。这是生物的特点，也是生命的基本特征。 3、关注：人是否是生物的理解。
4、设计意图：对生命的特征有一个基本的认识。
roken problem, fill the short Board, so that the majority of party members and fully qualified, comprehensive skills of grass-roots party organizations, grass-roots party level upgrade. Comrades, do a \ng education is of great significance, responsibilities, carry significant implications. City levels party and general members cadres, to deep awareness \do\ning education of importance and need, to height of political consciously and full of political enthusiasm, put \n a do\ning education carried out good, for coordination advance \a full\chieved \n-Five%up construction more high ecological vitality happiness of City provides strong powerful guarantee. Two, starting from the revered Constitution respected the party Constitution was XI Jinping, General Secretary to the party's request, 18 six plenary session of the Central Commission for discipline inspection report \Full strictly administering the party, first of all, to exalt the party Constitution, and pipe the whole party, the ruling party of the party Constitution. Revered Constitution reflected in awe. Party a party of ideals and beliefs purpose, summed up the party's fine tradition and style; a clear party members and what can be done and what must be done, what cannot be done. Each Communist Party Constitution to awe and wary eye enhancing the sacred sense of responsibility and mission. Hearts filled with party Constitution, hold the party line, BA obligations unconditionally carry out party members, according to the Constitution of direction towards standards efforts. Respect reflected in the study the party Constitution means. Some party members joined the party Constitution on the shelf, not to learn, some long-term party according to the Constitution of the party's organization, the party is not required to pay membership dues, loose concept, party organizations of the party organization, and turned a blind eye on the tasks assigned by the Organization, were forgotten, forgotten vows performance the party Constitution. Constitution is the fundamental standard of our Communists are slim, the party Constitution to repeatedly learn, practice, thinking, learning and thinking, thinking and row, row, ever-spiraling increase in the learning process. Respect party lines reflected in practice. Two to learn a basic Constitution Party rules, series of speeches, the key to be qualified party members. To be qualified party members, standards are not high, but if he does take a ruler of the party Constitution to \d\sy. Carry out study and education, every party must control the party's eight obligations, ask, look for gaps, identify problems, clear direction, work to solve specific problems. Actively practicing in the production life of the eight obligations, to play a vanguard and exemplary role, truly a party banner. \hlight grass-roots party organizations carried out \ce line pioneer standard, and post spurs\service months\de members always everywhere bearing in mind identity, based job post, active play role. To develop differentiated learning education guide party members in accordance with their own situation, target the problems to, based on the work done. Pay attention to the room and room for grass-roots party organizations, grass-roots party organizations have more autonomy in education, making education more ground, full of vitality, good effect. Finally, highlight the normal long-term. To highlight the characteristics of recurrent education, with long flowing, continuous line of perseverance the perseverance to promote educational efforts to realize the party's ideological and political construction of routine institutionalization. With the party branch as the base unit. Play the role of party branches should be, is the key to educational success. Each branch must take stricteducation and management responsibility of party members, education based on learning to make specific arrangements, fully mobilize the enthusiasm of party members involved in the education, ensure the Organization in place, measures in place, put in place. To the party organization as the basic form. In the standardized development of learning, make learning more effective efforts, and will adhere to the good party group, organized party, party members and the General Assembly, tell a good party lectures, can drive a good topic about, prevent showy without substance, Sham mules. To implement the education management system for basic support. Democratic mutual evaluation on party members in accordance with the regulations, the real performance criteria and order established, sound carefully dispose of unqualified party members, to further improve the dredge export team, pure self cleaning mechanism. Party leading cadres should adhere to nd implement the central group learning system, to which branch of learning exchanges, participation in a dual organization with comrades. Focus on recurrent education, you also need to continue to strengthen the building of grass-roots party organizations. Now, the city also has 88 village party organizations are weak and lax, first Secretary of the village, but conversion requires a process. Recently, the city's party organization focused investigation, check out a total of \ members 1037, find there are 640 \are not contacted 148 \nd implementation of organizational relationships. Educational management of party members into the Organization, there is a lot of work to do. Weak and lax party continued reorganization as an important task, finish perfect organization, with a good team, Good system. Special highlights of grass-roots party organizations, to be dealt with first in place, further education, reorganization, transformation and educationalinteraction. In short, through solid and effective work initiatives
第1课 观察我们周围的材料
【教学目标】 科学概念：
1．物体都是由一种或多种材料做成的，我们的周围存在着许多不同种类的材料。
2．我们周围的常见材料有木头、纸、金属、塑料、玻璃、纤维等。 过程与方法：
1．调查材料在日常生活中的应用。 2．观察和辨认不同的材料。 3．用词语描述常见材料。
情感、态度、价值观：发展进一步研究材料的兴趣和愿望。 【教学重点】观察和辨认身边不同的材料 【教学难点】用适当的词语描述木材的特性 【教学准备】6种用最常见的材料做成的物品 【教学过程】
一、观察我们周围的材料
1．这个单元我们将开始学习“材料”，板书“材料”。你知道哪些材料的名称？什么物品是用这种材料做的？教师将学生说到的材料一一板书出来。
2．看看自己和小组里的同学，身上穿的、佩戴的和携带的物品都是什么材料做成的，试着把它们写在书中的表格中。
3．交流记录的情况，看看有没有出错。
4．这些材料在我们身边应用很广，书包里的物品、教室里的物品，它们又分别是用什么材料制成的，四人小组合作完成调查表，对于难以判断是什么材料制成的物品，请作出标记。
5．调查结束后，在小组内讨论以下问题：
roken problem, fill the short Board, so that the majority of party members and fully qualified, comprehensive skills of grass-roots party organizations, grass-roots party level upgrade. Comrades, do a \ng education is of great significance, responsibilities, carry significant implications. City levels party and general members cadres, to deep awareness \do\ learning education of importance and need, to height of political consciously and full of political enthusiasm, put \n a do\ning education carried out good, for coordination advance \a full\chieved \n-Five%up construction more high ecological vitality happiness of City provides strong powerful guarantee. Two, starting from the revered Constitution respected the party Constitution was XI Jinping, General Secretary to the party's request, 18 six plenary session of the Central Commission for discipline inspection report \Full strictly administering the party, first of all, to exalt the party Constitution, and pipe the whole party, the ruling party of the party Constitution. Revered Constitution reflected in awe. Party a party of ideals and beliefs purpose, summed up the party's fine tradition and style; a clear party members and what can be done and what must be done, what cannot be done. Each Communist Party Constitution to awe and wary eye enhancing the sacred sense of responsibility and mission. Hearts filled with party Constitution, hold the party line, BA obligations unconditionally carry out party members, according to the Constitution of direction towards standards efforts. Respect reflected in the study the party Constitution means. Some party members joined the party Constitution on the shelf, not to learn, some long-term party according to the Constitution of the party's organization, the party is not required to pay membership dues, loose concept, party organizations of the party organization, and turned a blind eye on the tasks assigned by the Organization, were forgotten, forgotten vows performance the party Constitution. Constitution is the fundamental standard of our Communists are slim, the party Constitution to repeatedly learn, practice, thinking, learning and thinking, thinking and row, row, ever-spiraling increase in the learning process. Respect party lines reflected in practice. Two to learn a basic Constitution Party rules, series of speeches, the key to be qualified party members. To be qualified party members, standards are not high, but if he does take a ruler of the party Constitution to \d\sy. Carry out study and education, every party must control the party's eight obligations, ask, look for gaps, identify problems, clear direction, work to solve specific problems. Actively practicing in the production life of the eight obligations, to play a vanguard and exemplary role, truly a party banner. \hlight grass-roots party organizations carried out \ce line pioneer standard, and post spurs\service months\de members always everywhere bearing in mind identity, based job post, active play role. To develop differentiated learning education guide party members in accordance with their own situation, target the problems to, based on the work done. Pay attention to the room and room for grass-roots party organizations, grass-roots party organizations have more autonomy in education, making education more ground, full of vitality, good effect. Finally, highlight the normal long-term. To highlight the characteristics of recurrent education, with long flowing, continuous line of perseverance the perseverance to promote educational efforts to realize the party's ideological and political construction of routine institutionalization. With the party branch as the base unit. Play the role of party brnches should be, is the key to educational success. Each branch must take stricteducation and management responsibility of party members, education based on learning to make specific arrangements, fully mobilize the enthusiasm of party members involved in the education, ensure the Organization in place, measures in place, put in place. To the party organization as the basic form. In the standardized development of learning, make learning more effective efforts, and will adhere to the good party group, organized party, party members and the General Assembly, tell a good party lectures, can drive a good topic about, prevent showy without substance, Sham mules. To implement the education management system for basic support. Democratic mutual evaluation on party members in accordance with the regulations, the real performance criteria and order established, sound carefully dispose of unqualified party members, to further improve the dredge export team, pure self cleaning mechanism. Party leading cadres should adhere to and implement the central group learning system, to which branch of learning exchanges, participation in a dual organization with comrades. Focus on recurrent education, you also need to continue to strengthen the building of grass-roots party organizations. Now, the city also has 88 village party organizations are weak and lax, first Secretary of the village, but conversion requires a process. Recently, the city's party organization focused investigation, check out a total of \here are 640 \are not contacted 148 \nd implementation of organizational relationships. Educational management of party members into the Organization, there is a lot of work to do. Weak and lax party continued reorganization as an important task, finish perfect organization, with a good team, Good system. Special highlights of grass-roots party organizations, to be dealt with first in place, further education, reorganization, transformation and educationalinteraction. In short, through solid and effective work initiatives①调查了多少物品？使用了多少种材料？
②哪些物品是由一种材料制成的？哪些物品是由多种材料制成的。 ③哪种材料使用得最多？
6．在小组交流的基础上，全班交流
哪些材料在我们身边被广泛使用着，为什么大量使用它们呢？ 二、观察描述几种常见材料的主要特点
1．我们周围的物品，往往都是由各种材料组成的，比如一扇门，就使用了木头、玻璃、金属等材料，不同的部位为什么要用不同的材料？举例说说你的想法。
2．四人小组选择两种材料讨论它们分别有什么主要特点和用途，并记录下来。
3．交流各组的记录情况，有不同意见的及时补充，若认同其他组的观点，及时将它补充在自己的记录单上。
4．请保管好记录单，下次还要再使用。 板书设计： 教学后记：
第2课 谁更硬一些
【教学目标】 科学概念：
1．物理性质可以用来描述材料，比如硬度、柔韧性和在水中的沉浮能力。 2．材料的硬度越大，就越能防止别的物体破坏它的表面。 过程与方法：
1．用简单测量的方法检验材料的物理性质，通过比较发现材料的不同物理特性。
2．选择适当的词语定性描述材料。 情感、态度、价值观：
roken problem, fill the short Board, so that the majority of party members and fully qualified, comprehensive skills of grass-roots party organizations, grass-roots party level upgrade. Comrades, do a \ng education is of great significance, responsibilities, carry significant implications. City levels party and general members cadres, to deep awareness \do\ning education of importance and need, to height of political consciously and full of political enthusiasm, put \n a do\ning education carried out good, for coordination advance \a full\chieved \n-Five%up construction more high ecological vitality happiness of City provides strong powerful guarantee. Two, starting from the revered Constitution respected the party Constitution was XI Jinping, General Secretary to the party's request, 18 six plenary session of the Central Commission for discipline inspection report \Full strictly administering the party, first of all, to exalt the party Constitution, and pipe the whole party, the ruling party of the party Constitution. Revered Constitution reflected in awe. Party a party of ideals and beliefs purpose, summed up the party's fine tradition and style; a clear party members and what can be done and what must be done, what cannot be done. Each Communist Party Constitution to awe and wary eye enhancing the sacred sense of responsibility and mission. Hearts filled with party Constitution, hold the party line, BA obligations unconditionally carry out party members, according to the Constitution of direction towards standards efforts. Respect reflected in the study the party Constitution means. Some party members joined the party Constitution on the shelf, not to learn, some long-term party according to the Constitution of the party's organization, the party is not required to pay membership dues, loose concept, party organizations of the party organization, and turned a blind eye on the tasks assigned by the Organization, were forgotten, forgotten vows performance the party Constitution. Constitution is the fundamental standard of our Communists are slim, the party Constitution to repeatedly learn, practice, thinking, learning and thinking, thinking and row, row, ever-spiraling increase in the learning process. Respect party lines reflected in practice. Two to learn a basic Constitution Party rules, series of speeches, the key to be qualified party members. To be qualified party members, standards are not high, but if he does take a ruler of the party Constitution to \d\sy. Carry out study and education, every party must control the party's eight obligations, ask, look for gaps, identify problems, clear direction, work to solve specific problems. Actively practicing in the production life of the eight obligations, to play a vanguard and exemplary role, truly a party banner. \hlight grass-roots party organizations carried out \ce line pioneer standard, and post spurs\service months\de members always everywhere bearing in mind identity, based job post, active play role. To develop differentiated learning education guide party members in accordance with their own situation, target the problems to, based on the work done. Pay attention to the room and room for grass-roots party organizations, grass-roots party organizations have more autonomy in education, making education more ground, full of vitality, good effect. Finally, highlight the normal long-term. To highlight the characteristics of recurrent education, with long flowing, continuous line of perseverance the perseverance to promote educational efforts to realize the party's ideological and political construction of routine institutionalization. With the party branch as the base unit. Play the role of party branches should be, is the key to educational success. Each branch must take stricteducation and management responsibility of party members, education based on learning to make specific arrangements, fully mobilize the enthusiasm of party members involved in the education, ensure the Organization in place, measures in place, put in place. To the party organization as the basic form. In the standardized development of learning, make learning more effective efforts, and will adhere to the good party group, organized party, party members and the General Assembly, tell a good party lectures, can drive a good topic about, prevent showy without substance, Sham mules. To implement the education management system for basic support. Democratic mutual evaluation on party members in accordance with the regulations, the real performance criteria and order established, sound carefully dispose of unqualified party members, to further improve the dredge export team, pure self cleaning mechanism. Party leading cadres should adhere to nd implement the central group learning system, to which branch of learning exchanges, participation in a dual organization with comrades. Focus on recurrent education, you also need to continue to strengthen the building of grass-roots party organizations. Now, the city also has 88 village party organizations are weak and lax, first Secretary of the village, but conversion requires a process. Recently, the city's party organization focused investigation, check out a total of \ members 1037, find there are 640 \are not contacted 148 \nd implementation of organizational relationships. Educational management of party members into the Organization, there is a lot of work to do. Weak and lax party continued reorganization as an important task, finish perfect organization, with a good team, Good system. Special highlights of grass-roots party organizations, to be dealt with first in place, further education, reorganization, transformation and educationalinteraction. In short, through solid and effective work initiatives1．发展对物质世界的探索兴趣。
2．认同物理性质是可以被观察和测量的观点。 3．增强材料循环利用、节约资源的环境保护意识。 【教学重点】比较材料软硬的方法。
【教学难点】选择适当的词语定性描述金属的特征 【教学准备】
学生（每小组）：木头、纸、金属和塑料各两根，铁、铜、铝等金属片各一条，砂纸、玻璃杯、热水。
教师准备：电路检测器、榔头 【教学过程】 一、比较硬度
1．比较纸和木头的软硬，出示纸和木头，说说它们谁更硬一些？你是怎样观察到的？（纸一折就变形，而木头不容易折）
2．比较纸、木头、金属的软硬，再出示金属一条，这三材料谁更硬一些，你是怎样观察到的？
①学生说说自己的原先观察结果，可能会出现方面，那金属条和木块谁更硬一些（用压、捏、折的方法都不易区分它们的软硬）
②提出：判断一种材料是否比另一种更坚硬，可以用刻划的方法，若能在另一种材料表面划出痕迹，就表示它比较硬，反之则可能硬度相同或较小。
③学生尝试用木头在金属上刻划或金属在木头上刻划，看怎样做能划出痕迹。
3．比较木头、金属、塑料的软硬
①如果再给你一种材料：塑料，它们的软硬又会是怎样的？（学生猜测） ②可以怎样检测它们的软硬？
③怎样做到有序地观察？（出示书P48的记录表）
④实验中需要注意哪些方面？（根据学生回答、教师再适当补充，出示活动题方）
活动提示：
⑴依次选择其中一种材料，分别去刻划另两种材料的平面处。
roken problem, fill the short Board, so that the majority of party members and fully qualified, comprehensive skills of grass-roots party organizations, grass-roots party level upgrade. Comrades, do a \ng education is of great significance, responsibilities, carry significant implications. City levels party and general members cadres, to deep awareness \do\ learning education of importance and need, to height of political consciously and full of political enthusiasm, put \n a do\ning education carried out good, for coordination advance \a full\chieved \n-Five%up construction more high ecological vitality happiness of City provides strong powerful guarantee. Two, starting from the revered Constitution respected the party Constitution was XI Jinping, General Secretary to the party's request, 18 six plenary session of the Central Commission for discipline inspection report \Full strictly administering the party, first of all, to exalt the party Constitution, and pipe the whole party, the ruling party of the party Constitution. Revered Constitution reflected in awe. Party a party of ideals and beliefs purpose, summed up the party's fine tradition and style; a clear party members and what can be done and what must be done, what cannot be done. Each Communist Party Constitution to awe and wary eye enhancing the sacred sense of responsibility and mission. Hearts filled with party Constitution, hold the party line, BA obligations unconditionally carry out party members, according to the Constitution of direction towards standards efforts. Respect reflected in the study the party Constitution means. Some party members joined the party Constitution on the shelf, not to learn, some long-term party according to the Constitution of the party's organization, the party is not required to pay membership dues, loose concept, party organizations of the party organization, and turned a blind eye on the tasks assigned by the Organization, were forgotten, forgotten vows performance the party Constitution. Constitution is the fundamental standard of our Communists are slim, the party Constitution to repeatedly learn, practice, thinking, learning and thinking, thinking and row, row, ever-spiraling increase in the learning process. Respect party lines reflected in practice. Two to learn a basic Constitution Party rules, series of speeches, the key to be qualified party members. To be qualified party members, standards are not high, but if he does take a ruler of the party Constitution to \d\sy. Carry out study and education, every party must control the party's eight obligations, ask, look for gaps, identify problems, clear direction, work to solve specific problems. Actively practicing in the production life of the eight obligations, to play a vanguard and exemplary role, truly a party banner. \hlight grass-roots party organizations carried out \ce line pioneer standard, and post spurs\service months\de members always everywhere bearing in mind identity, based job post, active play role. To develop differentiated learning education guide party members in accordance with their own situation, target the problems to, based on the work done. Pay attention to the room and room for grass-roots party organizations, grass-roots party organizations have more autonomy in education, making education more ground, full of vitality, good effect. Finally, highlight the normal long-term. To highlight the characteristics of recurrent education, with long flowing, continuous line of perseverance the perseverance to promote educational efforts to realize the party's ideological and political construction of routine institutionalization. With the party branch as the base unit. Play the role of party brnches should be, is the key to educational success. Each branch must take stricteducation and management responsibility of party members, education based on learning to make specific arrangements, fully mobilize the enthusiasm of party members involved in the education, ensure the Organization in place, measures in place, put in place. To the party organization as the basic form. In the standardized development of learning, make learning more effective efforts, and will adhere to the good party group, organized party, party members and the General Assembly, tell a good party lectures, can drive a good topic about, prevent showy without substance, Sham mules. To implement the education management system for basic support. Democratic mutual evaluation on party members in accordance with the regulations, the real performance criteria and order established, sound carefully dispose of unqualified party members, to further improve the dredge export team, pure self cleaning mechanism. Party leading cadres should adhere to and implement the central group learning system, to which branch of learning exchanges, participation in a dual organization with comrades. Focus on recurrent education, you also need to continue to strengthen the building of grass-roots party organizations. Now, the city also has 88 village party organizations are weak and lax, first Secretary of the village, but conversion requires a process. Recently, the city's party organization focused investigation, check out a total of \here are 640 \are not contacted 148 \nd implementation of organizational relationships. Educational management of party members into the Organization, there is a lot of work to do. Weak and lax party continued reorganization as an important task, finish perfect organization, with a good team, Good system. Special highlights of grass-roots party organizations, to be dealt with first in place, further education, reorganization, transformation and educationalinteraction. In short, through solid and effective work initiatives⑵用力适度，并尽量保持在每一次刻划时用力大小相同。
⑶能划出刻痕的，在记录表格内打“√”，不能划出刻痕的，在记录表格内打“×”。
⑷要求每个人都操作一次，并且注意不要划伤手指。
⑸根据我们观察到的结果，将木头、纸、金属和塑料按硬度从大到小的顺序排列？哪种材料最硬？
二、认识金属
说说周围的物品中哪些地方用到了金属？
为什么用金属不用其它材料（根据学生的举例，出示材料开展实验） 1．易传热
将大小相同的木条、塑料和金属条同时放入热水中，过一段时间，用手摸一摸哪一种材料最热？
2．能导电
教师演示，将木条、塑料、金属条分别接入电路检测器，观察电灯泡是否发亮？
3．延展性
试着用榔头轻轻敲打铜丝，观察铜丝发生了什么变化？ 4．有金属
用砂纸磨擦铁钉、磨擦部位发生了什么变化？ 三、饮料罐的故事
1．组织学生阅读第50页，了解一个饮料罐的生产过程 2．讨论
①铝片之所可以做成饮料罐，主要利用了金属的什么性质？ ②在易拉罐的制作过程中，要消耗哪些资源，会产生哪些问题？ ③我们怎样合理使用消费金属材料？ 板书设计： 教学后记：
roken problem, fill the short Board, so that the majority of party members and fully qualified, comprehensive skills of grass-roots party organizations, grass-roots party level upgrade. Comrades, do a \ng education is of great significance, responsibilities, carry significant implications. City levels party and general members cadres, to deep awareness \do\ning education of importance and need, to height of political consciously and full of political enthusiasm, put \n a do\ning education carried out good, for coordination advance \a full\chieved \n-Five%up construction more high ecological vitality happiness of City provides strong powerful guarantee. Two, starting from the revered Constitution respected the party Constitution was XI Jinping, General Secretary to the party's request, 18 six plenary session of the Central Commission for discipline inspection report \Full strictly administering the party, first of all, to exalt the party Constitution, and pipe the whole party, the ruling party of the party Constitution. Revered Constitution reflected in awe. Party a party of ideals and beliefs purpose, summed up the party's fine tradition and style; a clear party members and what can be done and what must be done, what cannot be done. Each Communist Party Constitution to awe and wary eye enhancing the sacred sense of responsibility and mission. Hearts filled with party Constitution, hold the party line, BA obligations unconditionally carry out party members, according to the Constitution of direction towards standards efforts. Respect reflected in the study the party Constitution means. Some party members joined the party Constitution on the shelf, not to learn, some long-term party according to the Constitution of the party's organization, the party is not required to pay membership dues, loose concept, party organizations of the party organization, and turned a blind eye on the tasks assigned by the Organization, were forgotten, forgotten vows performance the party Constitution. Constitution is the fundamental standard of our Communists are slim, the party Constitution to repeatedly learn, practice, thinking, learning and thinking, thinking and row, row, ever-spiraling increase in the learning process. Respect party lines reflected in practice. Two to learn a basic Constitution Party rules, series of speeches, the key to be qualified party members. To be qualified party members, standards are not high, but if he does take a ruler of the party Constitution to \d\sy. Carry out study and education, every party must control the party's eight obligations, ask, look for gaps, identify problems, clear direction, work to solve specific problems. Actively practicing in the production life of the eight obligations, to play a vanguard and exemplary role, truly a party banner. \hlight grass-roots party organizations