Learners should be able to quite easily see this based on the speed with which the iodine changes colour in the unripe banana. An idea as introduction and/or conclusion to this section on Respiration is to let learners watch the YouTube video of a song about cell respiration: bit.ly/1eupZUz. Practice: Induced stem cells from healthy adults. This concept is developed within the scope of the CAPS prescriptions and will be used as a scaffold to explain the transfer of energy in the ecosystem in the subsequent chapter. Some of the energy is used to make ATP in the mitochondria during cellular respiration, and some is lost to the environment as heat. Energy is required to break down and build up molecules and to transport many molecules across plasma ... Autotrophic organisms perform both photosynthesis and respiration. Learners could suggest that they taste the substance to see if it is a starch or glucose. Instead animals have something else to provide support and protect the body. The clear limewater did not change and remained clear. Together, these two processes form a cycle that helps maintain constant levels of oxygen and carbon dioxide in the Earth's atmosphere. Respiration is the metabolic process that uses oxygen to release energy and releases carbon dioxide as a by-product. Carbon dioxide CO2 and water H2O are consumed in respiration. [5 marks]. Water and carbon dioxide are by- products and ATP is energy … The oxygen produced by plants during photosynthesis is what humans and animals inhale for the blood to transport to the cells for respiration. Fill in the products of respiration in the block on the left. Study the following properties of starch and glucose with your class. We have also explained how to use the bit.ly links to websites and videos in the front of the book. The young bean plants would have formed small leaves but the plants would slowly start to die. In physiology, respiration refers to the transport of oxygen from the outside air to the cells and the transport of carbon dioxide out of the tissues and into the air. Ensure that learners understand that respiration occurs constantly, during the … •Plants such as grass use energy from the sun to make its own food, therefore its called an Autotroph. 7. Abstract. Summary. Learners have already looked at photosynthesis and respiration in previous grades. Make sure your learners understand what a concept map is and that they have filled in the correct concepts into the empty spaces. Variegated mint-leaf is also very good for this investigation, and is a common plant in Kwa-Zulu Natal. For example, a reptile can lie in the Sun to warm up from the heat energy, but this does not provide the necessary energy for that animal to move, reproduce or excrete waste. In discussing these points facilitate the discussion and lead learners to conclude it is not a very accurate test, although a simple physical one that can give a fairly good indication. This type of respiration occurs in three steps: glycolysis; the Krebs cycle; and electron transport phosphorylation. The radiant energy of the sun acts as a reactant because it is required by photosynthesis but is not produced by photosynthesis A. We know respiration is one of the seven life processes, but what happens during respiration in organisms? Glucose is soluble in water. Before starting this investigation, all plants must be placed in a dark cupboard for up to 48 hours prior to starting the investigation in order to ensure that the plants do not have starch in the leaves before the process begins. Plant cells respire, just as animal cells do. You will need to prepare limewater prior to this activity. Respiration is an exothermic process that releases energy (from glucose), whereas photosynthesis is an endothermic process that absorbs energy (from sunlight). ATP is produced. We can write an equation for respiration as follows: glucose + oxygen → carbon dioxide + water + energy. Be curious and discover more online at our website! Summarise what you have learnt about respiration in the summary diagram below. H 2 O. NADPH. Think carefully about what information you need to record in order to come to conclusions at the end of your experiment. Matter is cycled through a system, and energy flows through a system using inputs and outputs. To test if a gas contains carbon dioxide, simply bubble the gas through limewater. Hypothesising, investigating, observing, measuring, analysing, writing, group work. (Solar energy), "What do plants get from the soil that they use for photosynthesis?" We also know that respiration releases energy. At the to… Humans, animals and plants depend on the cycle of cellular respiration and photosynthesis for survival. The steps in the method must be numbered. Plants use sugars (glucose) as a basic molecule from which to make hundreds of other compounds, such as proteins, oils, vitamins, colourful pigments in flowers, strong tasting chemicals (hot chilli plant), sweet tasting nectar and sweet smelling fragrances. Gravity. Conclusion: This should be a short statement in which they answer their aim or investigative question. 900 seconds . After conducting the investigation, you need to write up an experimental report of your findings. The energy required for cellular activities is provided directly by molecules of adenosine triphosphate (ATP). Respiration is the process in all living organisms by which energy is released from glucose in a series of chemical reactions. Similarities between Photosynthesis and Cellular Respiration, Differences between Photosynthesis and Cellular Respiration. (This question test the learner's ability to follow the logic of the experiment and to link the theory learnt and the practical application of it. to personalise content to better meet the needs of our users. Google Classroom Facebook Twitter. In National 5 Biology find out how aerobic respiration and fermentation release energy from food to produce the ATP required for cell activity. The equations are as follows: Photosynthesis: 6CO 2 + 6 H 2 O + energy -> C 6 H 12 O 6 +6O 2 o Carbon dioxide plus water plus energy yields sugar and oxygen The seven life processes are: movement (moving), reproduction (reproducing), sense the environment (sensing), growth (growing), respiration, excretion (excreting), nutrition (feeding). Photosynthesis and cellular respiration are the life processes performed by most living organisms to obtain usable energy from nature. Pharmacies are generally quite helpful and will assist schools in purchasing low cost syringes. What are the two causes of density in deep current waters? Fill in the products of photosynthesis in the block on the right. This is useful to the plant as it means it can transport the glucose in water to where it is needed elsewhere in the plant. This is a good opportunity to discuss kinetic energy and temperature of a solution. 2. Chemically speaking, respiration is photosynthesis in reverse, as you can see in this equation: C 6 H 12 O 6 + 6O 2 → 6H 2 O + 6CO 2 + energy. Simply type the link exactly as it is into the address bar in your browser. They are glucose (food) and oxygen. What does this mean? We can represent respiration as an equation in the same way as we did for photosynthesis. This teacher's guide contains the full version of each concept map. Using the tweezers, dip a leaf into the boiling water for 1-2 minutes. Others like to make things even more visual, using pictures and diagrams to form their summaries. 3. Assessment Rubric 4 can be used to mark this table if you would like a more in depth assessment. Some examples of what learners might produce are included here: Aim: To find out which parts of variegated leaves photosynthesise and store starch. (water), etc. Plants that lose their leaves in winter store food produced during the summer by photosynthesis. Some objects with potential energy are a book on the table (it has gravitational potential energy as it can fall down to the ground), a bouncing ball when it is at the top of its bounce as it can also fall back down, a batteries, fossil fuels have and food have potential energy. Record your observations in a table. In your report, you must have the following headings: In your results section you need to record your observations in a scientific way. The learners might also experience the tastes differently, making the results unreliable. 5. We will also conduct a starch test on the ripe and unripe bananas to see which contain more starch. Cellulose is used to support and strengthen plants. Photosynthesis is the process whereby green plants use carbon dioxide from the air, water from the soil and radiant energy from the Sun in a series of chemical reactions to produce glucose (food) and oxygen. According to my reading, energy is the strength and vitality to sustain physical or mental activity as it relates to humans (McKean, 1995).Energy is intertwined in all living things because plants are eaten by herbivores, and meat eaters or carnivores eat herbivores and other animals. •Photosynthesis= is a process by which a cell captures energy in sunlight and uses it to make food. Technology teachers at your school might also have syringes for their syringe mechanics lessons. Respiration consists of a complicated series of chemical reactions. Pisum sativum L. cv. Safety warning: remove the needles from the syringes, if there are any, before you hand out the syringes in class. Processes in photosynthesis are divided on basis of requirement of sunlight while respiration processes are divided on basis of requirement of oxygen. 0.0 Record your observations in the table. After 24 hours, pour 50 ml of the ethyl alcohol into the beaker and place it in the saucepan with water. The glucose is produced continuously during the day when the Sun is out and is not all used at once by the plant. Repeat this process for two more leaves that were in the well-lit area. Give reasons for your answer. Why were some plants placed in a well-lit area with direct sunlight and others in the dark? Embedded videos, simulations and presentations from external sources are not necessarily covered They must be written in full sentences. Most organisms cannot directly use the energy from the sun to perform the seven life processes. Produces energy in cells - cellular respiration, The REACTANTS of cellular respiration - glucose and oxygen, The PRODUCTS of cellular respiration - carbon dioxide, water and ATP, In which organelle does cellular respiration occur? This is the never ending cycle that sustains life on earth. Point out that air from your lungs contains a much higher percentage of carbon dioxide from respiration and so this is able to turn the limewater cloudy in a shorter time than atmospheric air will. Here are instructions on how to do this: For health reasons, there should be one straw or rubber tube per learner. You simply need to type this whole link into the address bar in your internet browser, either on your PC, tablet or mobile phone, and press enter, like this: It will direct you to our website where you can watch the video or visit the webpage online. Investigation: Why do bananas become sweeter as they ripen? Is there an investigation we can do to test for the presence of these compounds? Cellular respiration cannot occur without photosynthesis, and photosynthesis certainly cannot occur without the help of its partner. Use the test above to test whether there is starch present in the leaves from the plants that were kept in the dark. Learners should explain anything that they might have improved on in their results. What are the requirements for photosynthesis to occur? ATP is used in different ways mostly in animals for contraction, protein synthesis, and mental process. Photosynthesis takes place in small structures called chloroplasts, which are inside the cells of the leaves and stems of green plants. Iodine solution is dripped on it. However some sea slugs have learnt to absorb the chloroplasts from the green algae that they eat into their bodies and can actually photosynthesise themselves! We think you are located in It is also important to make sure that the only thing affecting the limewater was the gas released in the experiment, and not carbon dioxide from the atmosphere. They have also been introduced to photosynthesis in the context of green plants and food chains in Gr. Which of these is a product of photosynthesis and a requirement for cellular respiration? We will place some pot plants in the light for a day, and some other pot plants in a dark cupboard for a day, and then perform the investigation on the leaves of plants from both groups. Part 2 : Which parts of variegated leaves photosynthesise? While photosynthesis is performed by most plants which can prepare their own food, most animals fulfill their energy requirements throug… The amount of iodine solution required to observe a result depends on the leaf tested. This process is called respiration. … Spell. From Sunlight? Share it! Learn vocabulary, terms, and more with flashcards, games, and other study tools. Photosynthesis and Respiration. Photosynthesis occurs when plants use CO2 and water to produce carbohydrates in the presence of solar power while cellular respiration utilizes the carbohydrates to produce energy. For example in this case you could read: "Respiration takes place in all organisms, releases energy from food". Aerobic cellular respiration is the process by which cells use oxygen to help them convert glucose into energy. We have now seen how plants produce food during photosynthesis. [2 marks], Predict what would have happened after another few days with the beans hidden in his cupboard. Learners may get confused and think that because photosynthesis occurs during the day, that respiration only occurs during the night. Our most important source of energy is the Sun. Iodine changes from orange-brown to dark blue-black in the presence of starch and when it is dripped onto the leaf it changes to dark blue/black indicating that starch is present. While water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water. [8 marks], An example of a table is given here. Where do we get our energy from? The process of photosynthesis is used by plants and other photosynthetic organisms to produce energy, whereas the process of cellular respiration breaks down the energy for use. In this chapter we are going to investigate the processes involved in transferring the Sun's energy to our bodies to allow us to read this text! The "Key concepts" listed above is a summary written out in full sentences. This energy is then used to drive all the other processes in your body. The metabolic pathway by which plants cap-ture light energy and use it to make carbohydrates such as glu-cose is called photosynthesis. This being the first investigation that they will perform in high school, this activity will allow teachers to gauge their level of proficiency and abilities in this regard. The bean plants would die as the leaves would not have enough radiant energy to allow them to photosynthesise and produce glucose for the plants to use to grow and develop. The Sun provides energy to the Earth in the form of radiant (light) energy and heat energy. Place half of the plants in the dark for at least 24-48 hours and the others in a well-lit area of the class that is exposed to lots of natural sunlight. Sugar and oxygen O2 are produced in photosynthesis. Is this correct? The by-products are carbon dioxide and water. H 2 O. "Knowledge is real knowledge only when it is acquired by the efforts of your intellect, not by memory." KOK B , SPRUIT CJ Biochim Biophys Acta , 19(2):212-223, 01 Feb 1956 Comparison chart Photosynthesis Respiration Production of ATP Yes Yes; theoretical yield is 38 ATP molecules per glucose but actual yield is only about 30-32. 6 and 7? Breathing is the act of inhaling and exhaling air into and out of the lungs. Remove the plants that were in the dark for at least 24 hours. Cellular respiration uses glucose and oxygen to produce carbon dioxide and water. Respiration to take place requires glucose and oxygen to yield carbon dioxide and water. Geranium leaves are an excellent option for this investigation. Photosynthesis requires sunlight and can only take place during daylight hours. The lower quantum requirement obtained at low light intensity is believed to be due to a relatively greater importance of contribution of energy from respiration to photosynthesis. Plants only photosynthesise during the day, and not at night. This is one skill which might help them later in their school career where they have a lot more information to ingest and learn and make sense of. Photosynthesis requires energy in the form of light to drive the chemical reaction. Pour clear limewater into each beaker until they are half full. [2 marks], What should he have done to make his bean plants grow tall and strong? Starch is also stored in the stems, roots and fruit. This is the currently selected item. Which substance from the light-dependent reactions of photosynthesis is a source of energy for the light-independent reactions? 5. Do you remember what the seven life processes are? This is what learners' diagrams should look like: Have you noticed the VISIT boxes in the margins which contain links? Explain what the results of the iodine test indicates. There are two parts to this investigation. This specific point was included to allow teachers to reinforce this rule with learners and that we only ever do a taste test if we are sure that a substance is in fact edible. Post the equations of these processes where the students can see them. Plants change the glucose that they produce into starch that can be stored more easily. [3 marks]. It is test tube B as it contained clear limewater to start which has gone milky. Mitochondrial respiration appears to be critical for the provision of ATP necessary for energy demanding processes in the light. Photosynthesis:respiration (P:R) ratios were significantly and negatively related with temperature between 18 ~ and 31~ for all Hawaiian cor- als, whereas at Enewetak this ratio generally showed a curvilinear relationship for this temperature range. An alternative to a large syringe is to use a bicycle pump or balloon blower. These will be used to act out the processes of photosynthesis and respiration. You will need variegated and normal leaves for this investigation. Although this can be used as a fairly simple, physical test, it has several problems. Carbon dioxide produced during respiration is one of the reactants plants need to perform photosynthesis. We provide evidence that AOX respiration is necessary to promote chloroplast energy balance and to optimize photosynthesis, particularly under conditions that combine high growth irradiance and abiotic stress. Learners must record the items in a bulleted list and take note of measurements. You table should highlight the differences in requirements, the differences in the products, which organisms the processes takes place in, and when. Explain what you think happens to the starch as the bananas ripen. You can do this using a table, diagrams or a combination of both. Depending on what he planted the beans in, he might have noticed a root and first leaves forming. a) During the day and night b) During the night only c) During the day only 5) Choose the plants process of making own food a) respiration b) excreation c) photosnthesis 6) Why are plants important to living things ? Energy is needed to sustain life and without it nothing would be able to live on Earth. ADP. Oxygen is not needed for glycolysis but is required for … Energy plays an essential role within the processes of cellular respiration and photosynthesis. What do you think or predict will happen when you conduct this investigation? Plants use photosynthesis in which they use sunlight and Co2 to produce glucose as their food. United States. The second method which has been employed is the measurement of oxygen uptake of illuminated cells deprived of C02 (inhibition of photosynthesis) (3). answer choices . Energy for living things comes from - food Originally the energy in food comes from - sun. To emphasize this point even more, the equation for photosynthesis is the opposite of cellular respiration. Energy is the ability to do work – ... • Requirements for photosynthesis: 6 CO 2 + 6 H 2O Light C 6H 12O 6 + 6 O 2 Sunlight- almost all organism depend on energy from the sun . When the sludge dissolves completely, add more solid Ca(OH). Help your learners to understand and "read" the concept maps by constructing sentences from them. What does it provide us with? Real understanding and knowledge comes from grappling with the subject matter, and not just memorizing facts. But, this is not a very accurate test. Use the pipette or dropper to carefully drop 2 or 3 drops of iodine solution on the leaf in the petri dish and record your observations. We call it a by-product as it is not the main product that is wanted from the process. 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