To consider that the important issue is not to calculate the emissions for each car model and engine, but to find a way to represent the vast array of data and how to find representative values for them. To calculate emissions produced by cars and to develop models (tables, graphs and/or formulas). Results obtained here will be taken up again at the end of the project in order to produce the final report, once the amount of CO2 a tree can compensate for has been investigated. Appendix II: experiment using Elodea canadensis– task 3 Photosynthesis is a process in which carbon dioxideand light are combined to generate carbohydrates and oxygen. Normally, special instruments are needed to observe the process and to measure it. Usually, these instruments cannot be found in a school laboratory. However, there are some special cases in which the process is visible and some rough measurements can be made. In this experiment, students will work with a type of aquatic plant: Elodea canadensis. The mainadvantage of this is that, when oxygen is produced, it produced little bubbles that are visible. We can use the amount of oxygen given off by the plant as a measure of how much photosynthesis is taking place. In some versions of this experiment, baking soda is used in order to get a higher concentration of CO2. You can explore this option, but consider that extra bubbles mayappear and they must be removed before the experiment starts. We will suggest other ways of increasing the CO2 concentration in water, such as using exhaled air throughout straws. Students should work in groups and share their observations and conclusions at the end of the experiment. The teacher should promote and manage collaborative classroom discussion and reflections about CO2 consumption. Lab materials Plant Elodea Canadensis,beakers (250 ml), test tubes (30 mm Ø), water, sodium hydrogen carbonate solution (10 % w/v),
To consider that the important issue is not to calculate the emissions for each car model and engine, but to find a way to represent the vast array of data and how to find representative values for them. To calculate emissions produced by cars and to develop models (tables, graphs and/or formulas). Results obtained here will be taken up again at the end of the project in order to produce the final report, once the amount of CO2 a tree can compensate for has been investigated. Appendix II: experiment using Elodea canadensis– task 3 Photosynthesis is a process in which carbon dioxideand light are combined to generate carbohydrates and oxygen. Normally, special instruments are needed to observe the process and to measure it. Usually, these instruments cannot be found in a school laboratory. However, there are some special cases in which the process is visible and some rough measurements can be made. In this experiment, students will work with a type of aquatic plant: Elodea canadensis. The mainadvantage of this is that, when oxygen is produced, it produced little bubbles that are visible. We can use the amount of oxygen given off by the plant as a measure of how much photosynthesis is taking place. In some versions of this experiment, baking soda is used in order to get a higher concentration of CO2. You can explore this option, but consider that extra bubbles mayappear and they must be removed before the experiment starts. We will suggest other ways of increasing the CO2 concentration in water, such as using exhaled air throughout straws. Students should work in groups and share their observations and conclusions at the end of the experiment. The teacher should promote and manage collaborative classroom discussion and reflections about CO2 consumption. Lab materials Plant Elodea Canadensis,beakers (250 ml), test tubes (30 mm Ø), water, sodium hydrogen carbonate solution (10 % w/v),
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