第三单元 Unit 3 生物的生长与繁殖 Growth and reproduction of organisms 第十课 Lesson 10 种子发芽了 The seeds germinated 1.一粒种子是怎样长成一株植物的 ?它的生长过程是怎样的 ? How does a seed grow into a plant? How does it grow? l 准备聂子,放大镜、小刀 、瓷盘 、纱布 。 Prepare Nie Zi, magnifying glass, knife, porcelain plate and gauze. l 搜集大豆 、玉米 、花生等种子 。 Collect seeds of soybean, corn and peanut. 春天来了 ,落在土壤里的种子开始萌芽了 ,这说明了什么 ? Spring is coming, and the seeds that fall in the soil begin to sprout. What does that mean? 我们一起研究吧 。 Let's study it together. 2.选择几粒在水中浸泡过的种子 ,观察 、研究他们的构造。 Select a few seeds soaked in water to observe and study their structure. 画出种子的各部分 Draw the parts of the seed 3.种子发芽 seed germination l 种子发芽需要什么条? What strips do seeds need to germinate? 可能与水有关 。 It may be related to water. 我认为 …… I think l 根据猜想 ,制定我们的实验方案 。 According to the conjecture, we made our experiment plan. 其他条件必须相同才可以 。 Other conditions must be the same. 研究种子发芽与水的关系,可以进行对比研究 。 The relationship between Seed Germination and water can be studied comparatively. 实验目的 :研究种子发芽与水的关系 。 Objective: To study the relationship between Seed Germination and water. 观察对象 :大豆种子 Participants: soybean seeds 不同条件 :一号种子放在有水环境中 ,二号种子放在无水环境中。 Different conditions: No.1 seed was put in water environment, No.2 seed was put in water environment. 观察记录 : Observation record: 大豆种子 Soybean seed 1号 No.1 2号 No.2 第一天 first day 第二天 the second day 这是我制定的方案 。 This is my plan. l 做实验 ,观察种子发芽 。 Do experiments and observe seed germination. 有水环境中的大豆 Soybean in water environment 无水环境中的大豆 Soybean in waterless environment 这是我做的对比实验 。 This is my comparative experiment. l 把发芽的种子种在花盆里 ,继续观察 。 Plant the germinated seeds in a flowerpot and continue to observe. 持续观察植物的生长,你会有更多的发现 。 Keep looking at the growth of plants and you will find more. 4.交流我们的研究成果 。 Share our research results. 就是我画的种子构造图 , That's the seed structure I drew, 种子发芽需要水 。 Seeds need water to germinate. 通过实验我发现种子发芽需要空气 Through experiments, I found that seeds need air to germinate 这是我观察到的 。 This is what I observed. 5.查阅资料 ,了解辣椒种植的基本方法 。 Access to information, understand the basic methods of pepper planting. |
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