教案

環教圖書館

The Web of Life

 
瀏覽人數:84
發表者姓名 Rebecca Moss
適用組別 社會組
教案主題 The Web of Life
知識分類 環境概念知識
內容類型 自然保育
實施方法 活動
教學場域 教室
教學時數 0.67小時
教學目的 Students will complete a simulation that describes the interdependence of various organisms with other components of the ecosystem.
教學內容 1. Divide the class into three groups. Assign each group one of the following names: Prairie, Woodland, and Wetland. Hand out appropriate name tags for participants in each group. 2. Name tags represent different parts of an ecosystem. Include producers, consumers, decomposers, and non-living components. Have each group stand in a circle. Give a ball of string to one person in each group. 3. To start the game, the person with the string should wind an end around his/her hand and throw it to another person in the group, stating a relationship between the two things represented on their name tags. The string should be thrown from person to person until every member of the group is linked to everyone else and the ball is returned to the first person. The idea is that all living and non-living components are connected. 4. Each group member should now stand back until the string is taut and stand very still. The person holding the original end of the string should gently begin tugging. Everyone feeling the tugging should tug in response. This should continue until everyone is tugging and the web is shaking. Ask how the tugging demonstration illustrates what happens when one of the links in an ecosystem is damaged through natural or human-made stress. (The rest of the ecosystem feels the effects.) 5. The group is then asked to pick one organism in the system that seems less important than the others. Have the organism drop out by dropping its string. Any organism whose string has gone slack should also drop its string. Soon the entire web lies on the ground. 6. After playing for a few rounds, ask the following questions: a. What happens when we remove a link in the ecosystem? Organisms that depend on it are affected. b. Were the changes more dramatic when the system was composed of many parts or when it had fewer parts? Fewer. c. What can we say about the relationship between how many parts the system has (its complexity or diversity) and how stable it is? In general, complexity makes it more stable.
參考網址 http://www.eecapacity.net/sites/default/files/resources/files/2011%20Urban%20EE%20Lessons_0.pdf
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更新日期:2016/05/10
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