organisms. Arrange them as in the carbon cycle. Students use the idea to produce cards to make a model for the water cycle. Evaluate each other’s models. 4.7.2.3 Decomposition Describe the factors which 2 Describe how plants and affect the rate of decay as: animals return materials Factors affect the Exhibition of objects to the environment. rate of decay of temperature and pictures to classify. Bread mould practical. organic matter. availability of oxygen Grass clippings: Classify items and availability of moisture Discuss what would thermos flasks with present conclusions availability of happen if things didn’t thermometers/ with reasons. microorganisms to carry decay when they die. temperature probes out decay Apply scientific Classify items as disinfectant pH reasoning to unfamiliar biodegradable and wet and dry build-up of toxic situation. and agree composting agent. substances. Demo: Explain why criteria for classification. Interpret data showing how Required practical: See each flask was set up factors affect the rate of Discuss how the rate of Practical Handbook. and predict the results. decay can be controlled Consider what controls Calculate the rate of decay by considering food are set up. using data. preservation, bodies Interpret data and preserved in bogs, calculate compost heaps. Required practical: plan and carry out a controlled Demo: Investigate the Required practical: investigation. Identify rate of decay of grass investigate the effect
organisms. Arrange them as in the carbon cycle. Students use the idea to produce cards to make a model for the water cycle. Evaluate each other’s models. 4.7.2.3 Decomposition Factors affect the rate of decay of organic matter. Required practical: investigate the effect Describe the factors which affect the rate of decay as: temperature availability of oxygen availability of moisture availability of microorganisms to carry out decay pH build-up of toxic substances. Interpret data showing how factors affect the rate of Calculate the rate of decay using data. Required practical: plan and carry out a controlled investigation. Identify 2 Describe how plants and animals return materials to the environment. Bread mould practical. Discuss what would happen if things didn’t decay when they die. Classify items as biodegradable and and agree criteria for classification. Discuss how the rate of decay can be controlled by considering food preservation, bodies preserved in bogs, compost heaps. Demo: Investigate the rate of decay of grass Classify items and present conclusions with reasons. Apply scientific reasoning to unfamiliar situation. Demo: Explain why each flask was set up and predict the results. Consider what controls are set up. Interpret data and calculate Exhibition of objects and pictures to classify. Grass clippings: thermos flasks with thermometers/ temperature probes disinfectant wet and dry composting agent. Required practical: See Practical Handbook.
AQA-8461-SOW-ECOL.DOCX