4.4.1.1 Photosynthetic Photosynthesis is 1 Ask students to recap KS3 and Students can test for starch reaction represented by: define the word equation for in a green leaf compared to a photosynthesis when given the variegated leaf or leaf kept in reactants and products. the dark. Describe the method used to Photosynthesis is an test a leaf for starch, including endothermic reaction. a risk assessment. Energy is transferred from the Describe the need for environment to the chlorophyll and light for the chloroplast by photosynthetic reaction to occur. 4.4.1.2 Rate of The rate of photosynthesis 1 Describe the effects of Required practical 3: photosynthesis may be affected by: temperature, light intensity and investigate the effect of a temperature carbon dioxide concentration factor on the rate of Required level of carbon dioxide on the rate of photosynthesis. photosynthesis. practical: light intensity photosynthesis amount of chlorophyll. Draw graphs to illustrate the Investigate the rate of effect that changing these photosynthesis with changing Investigate the factors has on the rate of light intensity. Use numbers effect of light intensity on the photosynthesis. of bubbles of oxygen from Elodea or similar pondweed rate of Define limiting factor. to measure the rate. photosynthesis using an aquatic Describe how to test the effects organism such as of changing light intensity on pondweed. photosynthetic rate in pond AT skills covered weed. by this practical activity: biology
4.4.1.1 Photosynthetic reaction Photosynthesis is represented by: Photosynthesis is an endothermic reaction. Energy is transferred from the environment to the chloroplast by 1 Ask students to recap KS3 and define the word equation for photosynthesis when given the reactants and products. Describe the method used to test a leaf for starch, including a risk assessment. Describe the need for chlorophyll and light for the photosynthetic reaction to occur. Students can test for starch in a green leaf compared to a variegated leaf or leaf kept in the dark. 4.4.1.2 Rate of photosynthesis Required practical: photosynthesis Investigate the effect of light intensity on the rate of photosynthesis using an aquatic organism such as pondweed. AT skills covered by this practical activity: biology The rate of photosynthesis may be affected by: temperature level of carbon dioxide light intensity amount of chlorophyll. 1 Describe the effects of temperature, light intensity and carbon dioxide concentration on the rate of photosynthesis. Draw graphs to illustrate the effect that changing these factors has on the rate of photosynthesis. Define limiting factor. Describe how to test the effects of changing light intensity on photosynthetic rate in pond weed. Required practical 3: investigate the effect of a factor on the rate of photosynthesis. Investigate the rate of photosynthesis with changing light intensity. Use numbers of bubbles of oxygen from Elodea or similar pondweed to measure the rate.
AQA-8464F-SOW-BIOEN.DOCX