2Two Bacteria细菌 Bacteria can be found in soil, air, water, inside and outside the bodies of animals and plants. They are everywhere。 在土壤、空气、水以及动植物的身体内外，都可以找到细菌，它们无处不在。 Collect text and picture information about bacteria。 搜集有关细菌的文字及图片资料。 To exchange the information we collect。 交流我们搜集的资料。 Aureus 球菌 Coli 杆菌 Spirillum 螺旋菌 Bacteria are a group of single-celled organisms whose individuals are so small that they can only be seen with the help of a microscope。 细菌是一类单细胞的生物，个体微小，必须借助显微镜才能观察到。 What is the relationship between bacteria and humans? 细菌与人类的关系是怎样的？ Food fermentation 食品发酵 Production of biogas 生产沼气 Make people sick 使人患病 Increase soil fertility 生物制药 I also know...... 我还知道...... The data card 资料卡 Bacteria have strong adaptability, a wide range of species, and are closely related to human beings。 细菌适应能力极强，种类繁多，分布广泛，与人类的关系极其密切。 Numerous saprophytic bacteria in nature can promote the continuous decay and decomposition of animal and plant remains。 自然界中无数的腐生细菌会促使动植物遗体不断地腐烂、分解。 Carbon dioxide, water and inorganic salts produced by decomposition of animal and plant remains are essential raw materials for plants to produce organic matter。 动植物遗体分解生成的二氧化碳、水和无机盐，又是植物制造有机物必不可少的原料。Therefore, bacteria play an important role in the circulation of carbon dioxide and other substances in nature。 可见，细菌对于自然界中二氧化碳等物质的循环起着重要的作用。 Bacteria breeding games。 细菌繁殖小游戏。 Put 1 grain of rice in cup 1, 2 grains of rice in cup 2 and 4 grains of rice in cup 3, Multiply in turn…… 在1号杯中放1粒大米，在2号杯中放2粒大米，在3号杯中放4粒大米，依次倍增...... The thickness of a newspaper is about 0.1 mm. If it can be folded in half all the time, calculate how thick it will be after 30 folds。 一张报纸厚度约为0.1毫米，假如能一直对折下去，计算一下对折30次后会有多厚。 The data card 资料卡 If a bacterium splits every 20 minutes, one changes into two, two changes into four, four changes into eight... 一个细菌如果每隔20分钟分裂一次，1变2，2变4，4变8...... All the time，It can split 72 times a day and night... Pay attention to health, prevent bacterial damage and benefit health。 一直这样分裂下去，一昼夜可以分裂72次......注意卫生，防止细菌侵害，有益身体健康。 Put some soil in a jar and bury the chicken or fish viscera in it. Observe the phenomenon after a period of time。 在一个广口瓶中放一些土，把鸡或鱼的内脏埋入其中，一段时间后观察现象。 Thinking: what does this mean? 思考：这说明了什么？ |
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