Topic 2 Year 9 biology
| Biology | |||
| Topic | Ecosystems 2 | ||
| No of lessons | 14 | ||
| When is it happening | Term 2 | ||
| What will students learn | Know the definition of aerobic respiration as being the release of energy from glucose in the presence of oxygen, explain the importance of respiration to living organisms, Write a word equation and a balanced symbol equation for aerobic and anaerobic respiration. Explain the similarities and differences between aerobic respiration and anaerobic respiration. Describe the difference between anaerobic respiration in animals, plants and microbes like yeast. Explain how specific activities involve aerobic or anaerobic respiration, Reseach how organisms living in extreme conditions use respiration to get their energy. Suggest how organisms living in different conditions use respiration to get their energy. Understand the process of fermentation and be able to summarise it in an equation. Describe the process of photosynthesis and how to write the word equation for photosynthesis the uses of the products of photosynthesis and the importance of these to other organisms, how the rate of photosynthesis can be affected by changing the external conditions, how respiration and photosynthesis are related in plants, write a balanced symbol equation for photosynthesis. Explain how plant leaves are adapted to obtain the resources required for photosynthesis including the importance of stomata, label a diagram of a section through a plant leaf, identifying the specialised cells, the role of plant roots and explain how plant roots are adapted to obtain named resources from the soil, potential ecological problems caused by the overuse of fertilisers, the names of the tissues that transport materials to and from the plant root, the importance of chlorophyll in photosynthesis. | ||
| Key Knowledge that students should know at the end of 'Topic' | This is the knowledge that students will meet for the first time in this topic | Sudents should be able to define aerobic and anaerobic respiration, explain the importance of respiration to living organisms, Write word equation and a balanced symbol equations for aerobic respiration in humans and write word and balanced symbol equations for anaerobic respiration in humans and microorganisms. Explain the similarities and differences between aerobic respiration and anaerobic respiration. Describe the difference between anaerobic respiration in animals, plants and microbes like yeast. Explain how specific activities involve aerobic or anaerobic respiration, Suggest how organisms living in different conditions use respiration to get their energy. Fermentation is the same as anaerobic respiration in yeast. Describe the importance of anaerobic respiration and how lactic acid builds up and the effects it has on the body. Explain what oxygen debt is and how the debt is repaid. Describe the process of photosynthesis and how to write the word equation for photosyn thesis, the uses of the products of photosynthesis and the importance of these to other organisms, how the rate of photosynthesis can be affected by changing the external conditions, how respiration and photosynthesis are related in plants, write a balanced symbol equation for photosynthesis. Explain how plant leaves are adapted to obtain the resources required for photosynthesis including the importance of stomata, Label a diagram of a section through a plant leaf, identifying the specialised cells, the role of plant roots and explain how plant roots are adapted to obtain named resources from the soil, potential ecological problems caused by the overuse of fertilisers, the names of the tissues that transport materials to and from the plant root, the importance of chlorophyll in photosynthesis. | |
| This is knowledge that students may have met before but will need to deepen their understanding | Students should be able to label a plant with the major parts- stem, root, leaf, fruit, seed and give basic description of the function of these parts. They should be able to state simply what a plant needs to grow and stay alive. Describe in basic terms the way in which water is transported within plants. | ||
| Key Skills that students should be able to demonstrate at the end of 'Topic' | This is the skills that students will meet for the first time in this topic | Setting up a respirometer to measure the rate of respiration in different invertebrates, measure time and temperature accurately. Measure different volumes of solutions using different sized measuring cylinders, measure volume of carbon dioxide produced at different temperatures during fermentation of yeast, calculate mean values from collected data. Test leaves for presence of starch using iodine. Handle chemicals safely, set up water baths at different temperatures. Plot and Interpret results/patterns from results collected and draw conclusions. Examine sections of leaves under a microscope. Draw a selection of cells which carry out photosynthesis. Examine sections of plant roots under the microscope. Draw a selection of specialised cells. Test leaves for the presence of starch using iodine solution. | |
| This is skills that students may have met before but will need to develop | Measuring time using a stopwatch, measuring temperature accurately using a thermometer, measuring volume of a solution using a measuring cylinder, calculating mean values, drawing and interpreting simple graphs, identifying patterns from results. Examine | ||
| Key vocabulary that students should know and understand |
Aerobic respiration, anaerobic respiration, reactants, products, fermentation, endothermic, photosynthesis, chlorophyll, stomata, xylem, phloem, fertilisers, transpiration, translocation, lactic acid, oxygen debt, respirometer, mitochondria |
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| The Big Question | What do we need to stay alive? | ||
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Key questions that students should be able to answer at the end of the 'Topic'
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What do we need for animals and plants to stay alive? | ||
| What are the products and reactants of aerobic respiration? | |||
| What are the similarities and differences between anaerobic and aerobic respiration | |||
| What is fermentation? | |||
| Why do we repeat experiments? | |||
| How can you prove that yeast produces carbon dioxide when it respires? | |||
| What do plants need to grow? | |||
| Describe the process of photosynthesis. | |||
| How do gases get in and out of leaves? | |||
| How are xylem and phloem cells adapted for their function? | |||
| What are the differences between photosynthesis and respiration? | |||
| Is chlorophyll essential for photosynthesis? | |||