光合作用吸收二氧化碳释放氧气

光合作用吸收二氧化碳释放氧气 实验结论:光合作用还产生 兴仁县德龙中学 七 年级 生物 教学案 三、光合作用的过程 班级: 学生姓名: 授课老师: 1、概念:绿色植物通过叶绿体～利用光能～把 和水转化成储存着能量 课题:第一节 光合作用吸收二氧化碳释放氧气 的有机物,如淀粉,～并且释放出 的过程。 第二节 绿色植物的呼吸作用 2、光合作用的达式: 课型:讲授课 课时:4课时 情景导入、板课题、揭示目标 3、光合作用实质: 一、学习目标 1.光合作用的原料和产物是什么, 2.光合作用的概念是什么, 四、光合作用在农业生产上的应用 3.光合作用的原理在农业生产上有怎样的应用, 比较一下三种种植方法～看看其生长状况 有何不同～并分析原因,从利用光合作用角 二、学习重难点 度分析,。 1、光合作用的公式:原料、条件、产物是什么。 种植过稀: 2、探究实验的过程。 合理密植: 种植过密: 学习过程 第二节 绿色植物的呼吸作用 一、课前导学 想一想～议一议 P121 海尔蒙特实验 探究点一 呼吸作用的概念及意义 1.海尔蒙特是否忽略了其他的因素呢, 、萌发的种子进行呼吸作用～煮熟的种子进行呼吸作用吗, , 1 2.是什么物质使柳树增重了呢, , 2、什么样的植物体能够进行呼吸作用呢, 二、课堂导学 第一节 光合作用吸收二氧化碳释放氧气 , 3、植物呼吸作用的部位是什么结构呢, 一、光合作用利用二氧化碳作为原料 P122 普利斯特利得出的结论:植物能够更新由于蜡烛燃烧或动物呼吸而变得 的 空气 种子萌发释放热量127 科学实验证明:蜡烛燃烧和动物呼吸都会排出 ～消耗 ～而植物的 实验1现象: 光合作用能够释放氧气～消耗 。除水以外～二氧化碳是绿色植物光合作装有萌发种子的保温瓶内的温度升高。装有煮熟的种子的保温瓶用的原料。 内温度不升高 二、光合作用还能产生氧气 阅读课本P123演示实验 实验结论: 萌发的种子放出了 注意观察 1.实验装置中的金鱼藻是否放出了气泡, 实验2:探究种子在呼吸作用中是否释放二氧化碳, 2.实验装置中快熄灭的卫生香伸进管口后是否复燃, 二氧化碳的性质: 二氧化碳的性质: coefficient not greater than 1.3; High efficiency: control 1 hour travel time between any two points within the various groups within the area up to half an hour, 1-hour access to the airport, 45min reached the city's main traffic hub, external highway for half an hour with the main channels connecting bus 1.5 hours between any two groups of core areas; Intensive: 2030 transit share rate of around 35%, 2050 bus sharing rate of 45% per cent. 3rd chapter, Yibin city, traffic situation and General ... 3.1.1 city traffic status 1, external transport passenger and cargo traffic in Yibin city, traffic at the present main railway, highway, waterway and air four modes of passenger and freight transport, thereand cultural heritage, highlighting the cultural taste and shape characteristics of the city in Yibin. According to forecasts, vision 2050 population will reach 2.1 million people in the center of Yibin city, urban land is around 210km2. Figure 2.6-1 2050 figure 2.7 land use planning in the Center City, Yibin city development requires the development of bus rapid transit construction and socio-economic development trends, Yibin city coordination, supporting urban space layout and infrastructure networks, transport organized, internal and external traffic hub smoothly linking, realizing sustainable development of Yibin city integrated transportation system. Concrete can be summarized as, accessible, efficient, intensive and sustainable. Accessibility: Central built-up area road network density of about 7.0km/km2; bus line density of 3-4 km/km2, bus transfer 二氧化碳 + 澄清石灰水 ? 石灰水变混浊 活细胞 有机物(储存能量) 氧气 ， 实验现象: 水 二氧化碳 能量 ， ， 甲瓶里的气体能使澄清的石灰水变得浑浊～说明甲瓶里的气体中含有大量的二氧化碳. 概念:细胞内有机物在 的参与下被分解成 和水，同实验结论:萌发的种子释放出二氧化碳。 时释放出能量的过程，叫做 。 实验3:探究种子在呼吸作用中是否吸收氧气 当堂检测 实验现象: 1、判断 ,1,光合作用的原料是水和二氧化碳。, , 燃烧的蜡烛放进 瓶里～火焰立刻熄灭了。燃烧的蜡烛放进 瓶里～,2,植物的每个细胞都能进行光合作用。, , ,3,光合作用的实质是制造有机物～释放氧气～把有机物里的能量全部释放出来。, ,火焰没有立刻熄灭。 ,4,合理密植可以保证作物的叶子都能充分地接受光照～又不互相遮挡。, , 2、选择题 实验结论: ,1,(进行光合作用时～植物不需要的外界条件是, , A.二氧化碳 B(水 C(高温 D(光 甲瓶里缺少氧～乙瓶里有氧～甲瓶里的氧被萌发的种子吸收了,(植物光合作用的实质是, , ,2 拓展延伸 A(合成有机物～释放能量 B(合成有机物～贮存能量 小结: 通过这三个演示实验，你认为种子在萌发的时候有什么现象发 C(分解有机物～贮存能量 D(分解有机物～释放能量 ,3,、光合作用的原料是, , 生, A.光和水 B.水和二氧化碳 C.叶绿体和光 D.氧和水 1.释放能量,4,(植物体进行吸作用的部位是, , A.只在叶片中 B.只在萌发的种子中C.只在根系中 D.在所有的活细胞中都能进行 1.释放能量 2(植物体进行呼吸作用的时间是, , A.只在白天 B.只在光下 C.在白天和黑夜 D.只在晚上 2. 拓展延伸 3.需要氧气 1、请用恰当的形式总结光合作用的原料、条件、场所和产物。 呼吸作用 原料: 2、课本P126图示为某农场温室大棚中增加二氧化碳浓度的一种仪器～大棚中安装这种产物: 仪器的目的是什么,原理又是什么, 条件: coefficient not greater than 1.3; High efficiency: control 1 hour travel time between any two points within the various groups within the area up to half an hour, 1-hour access to the airport, 45min reached the city's main traffic hub, external highway for half an hour with the main channels connecting bus 1.5 hours between any two groups of core areas; Intensive: 2030 transit share rate of around 35%, 2050 bus sharing rate of 45% per cent. 3rd chapter, Yibin city, traffic situation and General ... 3.1.1 city traffic status 1, external transport passenger and cargo traffic in Yibin city, traffic at the present main railway, highway, waterway and air four modes of passenger and freight transport, thereand cultural heritage, highlighting the cultural taste and shape characteristics of the city in Yibin. According to forecasts, vision 2050 population will reach 2.1 million people in the center of Yibin city, urban land is around 210km2. Figure 2.6-1 2050 figure 2.7 land use planning in the Center City, Yibin city development requires the development of bus rapid transit construction and socio-economic development trends, Yibin city coordination, supporting urban space layout and infrastructure networks, transport organized, internal and external traffic hub smoothly linking, realizing sustainable development of Yibin city integrated transportation system. Concrete can be summarized as, accessible, efficient, intensive and sustainable. Accessibility: Central built-up area road network density of about 7.0km/km2; bus line density of 3-4 km/km2, bus transfer 课后反思 coefficient not greater than 1.3; High efficiency: control 1 hour travel time between any two points within the various groups within the area up to half an hour, 1-hour access to the airport, 45min reached the city's main traffic hub, external highway for half an hour with the main channels connecting bus 1.5 hours between any two groups of core areas; Intensive: 2030 transit share rate of around 35%, 2050 bus sharing rate of 45% per cent. 3rd chapter, Yibin city, traffic situation and General ... 3.1.1 city traffic status 1, external transport passenger and cargo traffic in Yibin city, traffic at the present main railway, highway, waterway and air four modes of passenger and freight transport, thereand cultural heritage, highlighting the cultural taste and shape characteristics of the city in Yibin. According to forecasts, vision 2050 population will reach 2.1 million people in the center of Yibin city, urban land is around 210km2. Figure 2.6-1 2050 figure 2.7 land use planning in the Center City, Yibin city development requires the development of bus rapid transit construction and socio-economic development trends, Yibin city coordination, supporting urban space layout and infrastructure networks, transport organized, internal and external traffic hub smoothly linking, realizing sustainable development of Yibin city integrated transportation system. Concrete can be summarized as, accessible, efficient, intensive and sustainable. Accessibility: Central built-up area road network density of about 7.0km/km2; bus line density of 3-4 km/km2, bus transfer