Lesson Plan

解释植物如何利用葡萄糖

07_07_02-CN

Learning Outcomes

记住植物利用葡萄糖做的一些事情。

Higher: 解释为什么葡萄糖对所有生命都很重要
Middle: 解释为什么植物利用葡萄糖生产其他产物
Lower: 列举一些植物利用葡萄糖的方式

测试一片叶子是否含有淀粉

Higher: 解释为什么在实验中需要某些步骤
Middle: 描述该实验要证明什么
Lower: 按照规定的方法

Higher:
Middle:
Lower:

Activities

入门任务 - 参与

Method:

葡萄糖是一种糖。列举人们用糖做什么。学生们与讨论伙伴一起列出糖的用途。

Resources:

演示文稿 - 入门幻灯片 便利贴/小白板(可选)

故事 - 探索与解释

Method:

在演示过程中回答问题并参加活动。

Resources:

演示文稿

任务专家 - 解释

Method:

在今天的专家影片中,乔恩·贝杰里使用分子模型来演示光合作用的过程。

Resources:

演示文稿 - 专家影片

任务分配 - 详细说明

Method:

测试一片叶子是否含有淀粉 学生们要测试一片生长在黑暗中的叶子和一片生长在阳光下的叶子是否含有淀粉。学生们应该学会这种具体的方法。从一株在阳光直射下生长的植物取一片叶子。用本生灯或加热炉烧开 200 毫升水。然后将叶子放入烧杯中煮 2-3 分钟。先关闭本生灯/加热炉再继续!将盛有热水的烧杯放在耐热的面上。向大试管倒入乙醇(¾ 满)。用搅拌棒小心地* 将叶子从水中取出,放入装有乙醇的大试管。将大试管放在热水中静置 30 秒。把叶子从大试管中取出,用烧杯里的水把叶子上的乙醇冲洗掉。将叶子平铺在白瓷砖上,用吸液管滴 2-4 滴碘酒。再对一片在黑暗中生长 4-7 天的叶子重复以上步骤。*此时叶子比较易碎,容易破损,所以要小心处理。然后,小朋友们应该完成题纸上的问题。

Resources:

题纸 天竺葵或罗勒植物 大试管 乙醇 250 毫升烧杯 本生灯/加热炉和辅助设备 搅拌棒 白瓷砖 碘酒 吸液管

任务日志 - 评估

Method:

测验 演示结束时,孩子们与讨论伙伴一起接受测验并回答问题。

Resources:

演示文稿中的测验

Assessment

Questions to Ask During the Lesson

Why does a plant need glucose?

How to human beings get glucose?

Mark Allocation

NA

Choral Response Questions/ Phrase Suggestions

植物如何产生葡萄糖?为什么植物需要葡萄糖?集体回答/短语建议 植物在…过程中产生葡萄糖葡萄糖是在…时产生的。需要葡萄糖才能…

Teacher Mastery

Science Behind the Science:

The process of photosynthesis in plants is useful in making organic compounds out of carbon dioxide. This is doable through carbon-fixation reactions. The process produces both oxygen and organic compounds out of water, carbon dioxide and energy. 

Carbon dioxide is the source of carbon. It enters the photosynthetic process via the carbon-fixation reactions. These reactions take place in the dark. Photosynthesis produces organic products. Organic products must contain carbon. 

The main organic compounds that come from plant photosynthesis are carbohydrates. The simplest carbohydrate is glucose. Glucose is made from carbon dioxide, water and light energy in the process of photosynthesis. Glucose can be linked with other molecules to form more complex carbohydrates. It is the starting material for cellular respiration and the main product of photosynthesis. Glucose is the food source and can be used in different ways.  

Glucose is stored as starch and fats and oils. It is used for respiration to release energy too. It is used to produce cellulose which helps to strengthen the plant cell wall and to produce proteins like chlorophyll for light absorption and enzymes for chemical reactions.   

Curriculum Fields

National Curriculum

Biology - Material cycles and energy - photosynthetic organisms,such as plants and algae, use sunlight in photosynthesis to build organic molecules that are an essential energy store

CBSE

Grade 6 Getting to Know Plants.

Kingdom Of Saudi Arabia

6 年级 - 生命科学 - 生命过程 - 植物和微生物的生命过程 - 植物的生命过程 - 植物如何储存食物?

Chinese Compulsory Education Primary School Science

了解植物吸收阳光和水分,创造出自身生存所需的养分。

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