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【教学目标】 科学概念：
水葫芦叶柄部位膨大的海绵体充满空气是浮在水面上的原因。 水生植物都有根茎叶等器官，它们的生长需要水分、阳光和空气。 过程与方法：
用简图画出水生植物的主要形态特征，能看懂维恩图的表达方式。 在观察中提出问题，探究水葫芦浮在水面的秘密。 情感、态度、价值观：
培养研究水生植物的兴趣，体会到水生植物也是一个个活生生的生命个体。 【教学重点】利用维恩图总结水生陆生植物作为生命体的共同特征。 【教学难点】探究水生植物适应水生环境的结构特点。 【教学准备】
分组材料：几种常见的水生植物，其中最好有水葫芦和金鱼藻，一个水槽，一张记录纸。
【教学过程】
一、认识常见的水生植物
1.陆地上生长着许多植物水中也生长着许多植物。出示实物或图片，这就是两种常见的水生植物水葫芦和金鱼藻。你课外调查到的水生植物有哪些？你曾经看到过哪些水生植物？（补充认识水花生、浮萍、莲、菱、菖蒲、茭白等。）
二、观察水葫芦和金鱼藻
1.观察记录：塑料袋中装有水葫芦和金鱼藻，分发给各小组，要求放入水槽中（为了使金鱼藻能沉在水底有利于观察和简图记录，可在其底部粘橡皮泥），观察它们在水中的样子，并用简图把它们画下来。
2.思考：把橡皮泥去掉，比较观察水葫芦和金鱼藻在水中有什么共同之处？对，都能浮在水面上，会有什么秘密呢？
3.探究：尝试剖开水葫芦的叶柄，我们会有什么发现？这种海绵状气囊结构很轻，所以能浮在水面上（适应水生植物的环境）。其它水生植物是不是也有相似的结构？请课外继续探究。
三、比较水葫芦和金鱼藻
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 initiatives水葫芦和金鱼藻有哪些相似之处？（除了形态结构特征外，还可以稍作拓展，如它们都会繁殖后代，都会死亡等。）它们是水生植物，它们的生长需要什么条件？
四、比较水葫芦和狗尾草
水葫芦等水生植物与陆生植物狗尾草等又有什么相同和不同之处？ 与前堂课学生总结的陆生植物的唯恩图进行比较，再次填写维恩图，完成对植物生命体特征的梳理。（都有根茎叶、都会繁殖后代、寿命都短、都是草本植物，都需要阳光、水分和空气等）
板书设计： 教学后记：
第五课 植物的叶
【教学目标】 科学概念：
树的叶是多种多样的，同一种树的叶具有共同的基本功特征。 植物的叶一般由叶片和叶柄组成，叶片上有叶脉。
叶也是有生命的，叶从叶芽开始生长，到最后衰老死亡，完成了一生。 过程与方法：
统计捡到的树叶的数量和树叶的种数；根据一定的判断依据，划分出同一种树叶和不同种的树叶。
水葫芦
狗尾草
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情感、态度、价值观：
发展研究树叶的兴趣，培养爱护环境，与自然和谐相处的态度和意识。 【教学重点】开展观察叶生命现象的活动，建构起叶也是有生命的科学概念。 【教学难点】是否是同一种树叶的判断。 【教学准备】
学生自备材料：捡一些落叶。
分组材料：同一种植物的新鲜叶和落叶。 教师准备：一条有大小不同叶片生长的树枝。 【教学过程】
一、统计收集到的树叶
课前大家分别从不同的地方收集到了各种树叶，说说你是怎么收集树叶的。是呀，树木是我们的朋友，他们是有生命的，所以我们不能随意摘树叶。现在把树叶放在桌上，以小组为单位进行统计：我捡了几片落叶？这里面有几种树叶？
二、观察比较树叶
1、质疑：我们小组共有几种树叶？这些叶子是同一种叶吗？
2、讨论：观察到了什么，才说它们是同一种叶？观察到了什么，才说它们不是同一种叶？同一种叶的主要特征有哪些呢？
3、比较：同时观察所有完整的叶，我们能发现不同种叶有什么相同的结构吗？是呀，大部分叶具有叶柄、叶片结构，叶片上还有叶脉。
三、观察叶的生命特征
1、观察：比较新鲜的叶与落叶，它们有什么相同和不同？思考：长在树上的新鲜叶与落叶的最大的不同表现在哪里？是呀，新鲜的叶是活的，而落叶是死的。
2、描述：观察一种植物的叶，我们能从中看出叶的生长变化过程吗？能找到这条树枝上有几种不同的生长阶段的树叶吗？（如叶芽、小叶片、嫩叶、成熟的叶、老叶、将枯的叶等）能从几张叶的不同生长阶段去推测一片叶的生长过程吗？
3、总结：叶也是有生命的，它从叶芽长成小小的嫩叶，又慢慢地长大，变老。许多植物的叶从春天长出来，到秋天枯黄死去，完成了叶的一生。有些树木
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 initiatives虽然秋天不落叶，但它们的叶同样也有生长和衰老的完整过程。
板书设计： 教学后记：
第六课 植物发生了什么变化
【教学目标】 科学概念：
植物在不断地发生变化，有些变化比较明显，有些变化不太明显。 植物的变化表现在各个方面，主要表现在发芽、生长、开花、结果等方面。 植物的变化是生命体的特征之一。 过程与方法：
能用测量的方法比较叶的大小，能用数据记录植物的变化。 情感、态度、价值观：
能够关注周围植物的变化，坚持记录完成一棵植物的变化记录表。 【教学重点】观察记录描述植物的变化。
【教学难点】坚持记录完成一棵植物的变化记录表。 【教学准备】
分组材料：一把尺子，4张不同大小的叶片，记录表。
教师准备：一些树木四季变化的图片，带花苞的菊花，狗尾草。 【教学过程】
一、怎样观察植物的变化
我们知道，春暖花开的季节，许多植物很快地进入生长期，发芽、长大、开花结果。秋天里，从开学到现在，好几个星期过去了，校园里的植物发生了什么变化？（可结合第2课的课外作业及学生的精彩发现激发学生的探究欲。）
讨论：我们可以观察植物的哪些变化？我们怎样观察？
首先得测量树干是否变粗了，我们得在树干的同一高度连续测量三次，取接近值（三年级孩子尚未接触过平均值的数学解法）；过一个阶段再同样测量进行记录。能不能看出树干的变化呢？
数数每天有多少落叶。菊花的花苞长得怎么样了？
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狗尾草会枯死吗？樟树的果实又是怎样变化的呢？ 二、观察叶的生长变化
可以测量一条树枝上的最大叶子、最小叶子和中间大小的叶子的长度或宽度，并做好记录，看一个阶段后它们分别有什么变化？还可以观察树叶的其他变化。
从一棵树的树叶大小不同、软硬不同中，我们知道了什么？ 从一片树叶的颜色变化过程中，我们又知道了什么？ 三、实地观察记录植物的茎、叶
1、活动：根据讨论的结果，我们分小组按计划到校园内进行观察，记录下第一手资料。（活动时间约15分钟）
2、交流：汇报我们的观察数据，思考这些数据能说明什么问题？ 落叶的数量说明什么问题？一条树枝上有大小不同的树叶，说明什么问题？如果以后测量得到的数据变化很大，说明什么？如果变化不大，又怎样理解？
四、记录一种植物的变化情况
我们还可以同时观察田野、路边和家里的植物发生了什么变化？
就这样一直观察你所选择的那棵树或草，观察它们在秋冬季的变化，一个月观察一次，把观察的结果记录在表中，你能做到吗？
我的____________变化记录表
月 日 月 日 月 日 月 日 月 日
这样坚持下去，我还可以知道大树一年四季中的变化。
板书设计：
树干 粗细 树皮 树冠 落叶数 叶子 颜色 大小 其他 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