Core practical light intensity and photosynthesis edexcel

Core practical light intensity and photosynthesis edexcel. Light meter. The light intensity was then calculated using GCSE 9 - 1 Biology Core Practical How does light intensity affect the rate of photosynthesisExperiment and answers to questions Photosynthesis - Edexcel Calculations Practical 6 - light intensity and photosynthesis The table shows a set of results obtained by students investigating the effect of light intensity on 3 Preparing solutions to make alginate beads (Refer to Recipe card 2): Dissolve 3 g of sodium alginate in 100 cm 3 of cold, pure water. photosynthesis 2c, 2d, 2g 4a, 4c 6. Aim: Investigate the effect of light intensity on the rate of photosynthesis using an aquatic organism such as pondweed. Write. Light intensity. 43B Role of Stomata in Gas Exchange; 2. DCPIP solution can stain, so avoid skin contact. The algae c that change r, but this ch concentratio Safe Wear eye Wash you the exper Avoid tou and the lam le. Use the metre ruler to place the uncovered bottles at specific distances from the lamp. Core Skills; An Tràth Ìre; A' Chiad Ìre; Edexcel; Photosynthesis - Edexcel Direct and inverse proportion Practical 6 - light intensity and photosynthesis; A lamp was used as a source of light. Figure 1 shows the scientist's results. uching the ho p. Look along the transect and pick a plant species that clearly changes in number along the line. This page includes the core information on the protocol and the students’ notes for 11-16 students. Core Practical: Investigate the effect of light intensity on the rate of photosynthesis . Repeat step 2, placing the quadrat every 2 metres down the tran sect to take samples so you have taken 10 across the 20m line. We find it difficult to do the experiment so it is a theoretical lesson. 3 Photosynthesis: Light-Dependent Stage; 5. Includes: * CB1 Using Microscopes * CB1 pH and Enzymes * CB1 Osmosis in Potato Slices * CB6 Light Intensity and Photosynthesis * CB8 Respiration Rates * CB9 Quadrats and Transects May 12, 2023 · An overview of the practical students should perform. carbon dioxide concentration Dec 13, 2017 · A resource for printing out on A3 which has some results from a core practical investigating light intensity. 22 Plants & Mineral Ions; 2. Aug 31, 2020 · Pearson Edexcel GCSE 9-1 for Combined Science Pearson Edexcel GCSE 9-1 for Separate Science BiologySpecification content topic 6 point 6. 26 KB. 18 The Process of Photosynthesis; 2. Light intensity reaching the chloroplast samples. Temperature Temperature affects the rate of photosynthesis. pptx, 173. 6MB) (PDF) Light intensity affects rate because it affects rate of photosynthesis , which in turn affects number of stomata which are open. Resource type: Assessment and revision. The beads are placed in a Hydrogencarbonate indicator, which changes colour with pH. Includes: * CB1 Using Microscopes * CB1 pH and Enzymes * CB1 Osmosis in Potato Slices * CB6 Light Intensity and Photosynthesis * CB8 Respiration Rates * CB9 Quadrats and Transects May 2, 2017 · Core Practical 11 – From Topic 5 (On The Wild Side) Aim. As the alga respire and photosynthesise, the concentration of carbon dioxide in the indicator 6. Independent Variable. 5 Chloroplasts; 5. Age range: 14-16. 44B Gas Exchange: Night vs Day; 2. The rate of photosynthesis increases as light intensity increases. 6 Explain how the rate of photosynthesis is directly Gas exchange due to photosynthesis is ignored and all of the gas is assumed to be oxygen. Use a timer to count the number of bubbles produced by the pond weed. To investigate photosynthesis using isolated chloroplasts (the Hill reaction). 1. r hands afte iment. Light intensity Light is required for photosynthesis. The intensity of the light available to the plant will affect the amount of energy that it has to carry out photosynthesis; The more light a plant receives, the faster the rate of photosynthesis; This trend will continue until some other factor required for photosynthesis prevents the rate from increasing further because it is 6. There are three main factors that limit the rate of photosynthesis: Temperature. 5 KB. Jun 7, 2023 · A resource to support the Edexcel Photosynthesis core practical. Effects of light intensity on photosynthesis. Energy from sunlight is absorbed by chlorophyll, a green pigment found inside chloroplasts. Report this So a limiting factor can be defined as something present in the environment in such short supply that it restricts life processes. In this example we will be using light intensity as the abiotic factor, 1. C - add 20 of the algal balls to each bottle. 29 KB. Repeat steps three and four 6 times increasing the distance by 10cm each time. 46 Structure of the Breathing System; 2. 4 Photosynthesis: Light-Independent Stage; 5. . How is the apparatus set up? An empty gas syringe should be connected to a flask with the pondweed and water (sodium hydrocarbonate may be added). Used as a revision tool during a core practical workshop but could be used alongside teaching during the topic. 7. Photosynthesis - Edexcel Factors affecting photosynthesis - light intensity. The energy is used to convert carbon dioxide, water and minerals the plants take in from their surroundings into sugar and gaseous oxygen. The rate of photosynthesis affects the rate at which the plant grows. The rate of photosynthesis is affected by the light intensity, the concentration of CO2 and the temperatures. If using a hot lamp, place the water tank next to the lamp. 23 Practical: Investigating Photosynthesis; 2. 39 MB. light in p. Move the Transpiration is an unavoidable consequence of photosynthesis close photosynthesis A chemical process used by plants to make glucose and oxygen from carbon dioxide and water, using light energy Feb 15, 2020 · Revision booklets and the accompanying PowerPoints for all of the core practicals in the biology section of the new Edexcel combined science GCSE (9-1). tensity hotosy an be trapp s colour as hanges to ye ns. 8. Stir with a spatula every half hour or so. Use a metre rule with zero at the light source to fix the boiling tube at 10cm from the light source. 5. icator at diffe rt. What can we use to measure light intensity. Repeat step 4 at 5 m intervals until you reach the end of the transect line. ty protection. Students work through the tasks to analyse the results of a practical. 41 MB. Subject: Biology. Jul 7, 2022 · pptx, 2. Ensure eye protection is worn. 3. For each s. Contains the following for all 3 core practicals: expectations for skills/knowledge pupils need to know for the exam; video link to the core practical video on the Edexcel youtube channel; questions that hone in on required skills/knowledge Jan 23, 2019 · File previews. 10 Investigate the effect of pH on enzyme activity, 1. 4. cover 1 side of beaker with foil to block out light. 8 Core Practical 10: Rate of Photosynthesis This video goes through the Core Practical investigating the rate of photosynthesis in algal balls with light intensity. -Oxygen is produced in photosynthesis and is given out off as apparatus Pieces of equipment. 45B Practical: The Effect of Light on Gas Exchange in Plants; 2. Check colour of the indicator against the colour of the chart and record it's starting pH. The light intensity was then calculated using the inverse square law . Oxygen is the rate of photosynthesis . The effect of light intensity on photosynthesis close photosynthesis A chemical process used by plants to make glucose and oxygen from carbon dioxide and water, using light energy. 7 Separation of Photosynthetic Pigments with Chromatography; 5. Repeat steps 1-3 in different areas at the site with the same e nvironmental gradient being Photosynthesis Theory. Term. e bottle cap rs of the indi H at the star e is observed e law. -light intensity on plant increases. Apr 21, 2018 · Mrs Peers-Dent shows you how to measure the rate of photosynthesis of pondweed. B - each distance needs one clear glass bottle and one extra one. Core Skills; An Tràth Ìre; A' Chiad Ìre; Photosynthesis - Edexcel Rate of photosynthesis Practical 6 - light intensity and photosynthesis; Calculations - using photosynthesis graphs Here you can find all the core practical videos for GCSE Combined Science (biology) and GCSE Biology (separate science). Dependent Variable. -----00:00 Preparing the sample02:34 Changing Light intensity. You will: measure the volume of oxygen produced by the pondweed as the light intensity changes as the light source is moved. extract and interpret graphs of photosynthesis rate May 6, 2010 · Practical: Measuring the rate of the light-dependent stage of photosynthesis. 8 Core Practical 10: Rate of Photosynthesis Feb 15, 2020 · Revision booklets and the accompanying PowerPoints for all of the core practicals in the biology section of the new Edexcel combined science GCSE (9-1). Use Cabomba or Elodea, which are sold in aquarium shops. 5 - Core Practical: Light Intensity and Rate of Photosynthesis We can set up a simple experiment to measure the rate of photosynthesis in a plant: We will need a sealed 100ml flask filled with water at room temperature , a gas syringe , a small amount of pondweed , a small lamp and a 1m ruler . Some examples of suitable topics are given below. 47 Role of the Intercostal Muscles & Diaphragm Core Practical INVESTIGATING PHOTOSYNTHESIS Purpose To investigate experimentally the link between the light-dependent and light-independent reactions. beaker should be sufficient. Flashcards. Download the core practical guide (8. Test. It is important to monitor the water temperature since the lamp will heat the water and affect the results. Core Skills; An Tràth Ìre Edexcel Practical The number of bubbles produced in 60 seconds was used to calculate the rate of photosynthesis. The effect of light intensity on the morphology of plants Study with Quizlet and memorize flashcards containing terms like 1. The plants will release bubbles of oxygen - a product independent variable being investigated, in this case use the light sensor and record a reading of the light intensity. Click the card to flip 👆 Green plants and algae use light energy to make glucose and oxygen from carbon dioxide and water. 1 / 49. This practical offers a fun way of measuring the rate of photosynthesis, using a green alga immobilised in alginate beads. Take a look at our core practical guide which contains further guidance, worksheets and exam questions to use alongside these videos. 24 Balanced Diet; 2. Dissolve 4 g of calcium chloride-6-water in 200 cm 3 of pure water in a 250 cm 3 beaker. Plot a graph of ‘number of plants 3 Describe how you might extend this practical to investigate the effect of light intensity on the light-dependent reactions of photosynthesis. It is a ‘prompt sheet’ of questions that pupils historically misunderstand or get incorrect during exams. It includes starter questions all about phot Mar 12, 2024 · Core practical: the effect of light intensity on the rate of photosynthesis. Independent variable = Distance between maxima, h; Dependent variable = The angle between the normal and each order, θ n (where n = 1, 2, 3 etc) photosynthesis 2c, 2d, 2g 4a, 4c 6. Core Practical: Investigate the effect of light intensity on the rate of photosynthesis. Carbon Dioxide + Water -(light and chlorophyll)--> Glucose + Oxygen 6CO2 + 6H20 --> C6H12O6 + 6O2 This is an endothermic reaction meaning energy is taken into the cell. Includes: * CB1 Using Microscopes * CB1 pH and Enzymes * CB1 Osmosis in Potato Slices * CB6 Light Intensity and Photosynthesis * CB8 Respiration Rates * CB9 Quadrats and Transects If a lamp is moved closer to a plant: -plants rate of photosynthesis will increase. was £4. Amount of DCPIP reduced (can be judged based on the colour of the mixture) Control Variables 1. HT ONLY: Explain how the rate of photosynthesis, including the use of the inverse Place a length of pond weed in the boiling tube with the cut end at the top. Lay a 20m tape measure from the open area to the shaded area. Carbon dioxide concentration. Measuring the rate of photosynthesis by counting the number of gas bubbles produced per unit time makes the assumption that all the gas in the bubbles is oxygen. Complex information has been broken down while using questioning to stretch many of the students at a variety of levels. 41B Gas Exchange in Relation to Respiration & Photosynthesis; 2. Leave overnight and stir in the morning. 4 Explain the interactions of temperature, light intensity and carbon dioxide concentration in limiting the rate of photosynthesis 4b, 4c, 4d 6. I have provided students with results and there is a practice exam question. A revision sheet to be used after the core practical on light intensity and photosynthesis. Includes: * CB1 Using Microscopes * CB1 pH and Enzymes * CB1 Osmosis in Potato Slices * CB6 Light Intensity and Photosynthesis * CB8 Respiration Rates * CB9 Quadrats and Transects. The greater the light intensity, the more energy supplied to the plant and therefore the faster the light-dependent stage of photosynthesis can occur; This produces more ATP and reduced NADP for the Calvin cycle, which can then also occur at a greater rate Green plants and algae use light energy to make glucose and oxygen from carbon dioxide and water. 25 Sources & Functions of Dietary Elements; 2. STUDY. pdf, 288. Explain how the rate of photosynthesis is directly proportional to light intensity, and light intensity being inversely proportional to the distance from a light source, including the use of the inverse square law calculation. Practical 6 - light intensity and photosynthesis; In this video you will learn all the science for this topic to get a grade 9 or A* in your science exams! In this video, you will learn:The effect of Light I Photosynthesis and light intensity core practical walk-through INTERNATIONAL GCSE Biology, Chemistry & Physics (2017) CORE PRACTICAL GUIDE Pearson Edexcel International GCSE in Science For first teaching September 2017 The light-dependent reactions of photosynthesis take place in the thylakoid membrane and involve the release of high-energy electrons from chlorophyll molecules in photosystems These electrons are picked up by the coenzyme NADP along with hydrogen ions from photolysis, forming NADPH , or reduced NADP 6. 1 Photosynthesis: Overview; 5. place lamp a set distance from the beaker. A - decide on the different distances between the algae and the lamp you are going to use. Practical 6 - light intensity and photosynthesis; Feb 18, 2022 · A description of the experiment specified for 2022 B2 Biology combined Science Foundation Edexcel. Any of these 3 factors can become a limiting factor. aim. Leave bottles for 1-2 hours. Another factor is limiting the rate of photosynthesis e. Plants can be food sources or shelter for many organisms. from open sunlight to a shaded area. Match. The lamp was placed at different distances (d) from the Cabomba plant, and the number of bubbles produced in 60 seconds was used to calculate the rate of photosynthesis. cover other side with 1 light filter. 20 Factors Affecting the Rate of Photosynthesis; 2. 6. I noticed there were very limited resources targeted towards lower-level Science GCSE and wanted to make resources that were engaging and fun. 10 investigate the effects of light intensity, light wavelength, temperature and availability of carbon dioxide on the rate of photosynthesis 51 11 carry out a study of the ecology of a habitat, such as using quadrats and transects to determine the distribution and abundance of organisms, Aim: Investigate the effect of light intensity on the rate of photosynthesis using an aquatic organism such as pondweed; You will: measure the volume of oxygen produced by the pondweed as the light intensity changes as the light source is moved; measure and calculate rates of photosynthesis • Explain the effects of temperature, light intensity and carbon dioxide concentration as limiting factors of photosynthesis • Explain how the interactions of these limiting factors can be helpful in maximising plant yield Video: Investigating photosynthesis • Describe how light intensity affects the rate of photosynthesis This fun and reliable practical makes investigating photosynthesis easy, with a technique that can be used with students from KS3 to post-16, and offering quantifiable and replicable results. Feb 29, 2024 · doc, 326. Photosynthesis is an endothermic reaction, meaning that energy is taking in from the surroundings and the temperature As light intensity increases, the rate of transpiration increases This is shown by the bubble moving a greater distance in the 30 minute time period when the lamp was placed closer to the leaf Transpiration rate increases with light intensity because more stomata tend to be open in bright light in order to maximise photosynthesis 6. Photosynthesis is an endothermic reaction in which energy from sunlight is transferred to the chloroplasts in green plants. Why does photosynthesis increase pH? A resource for printing out on A3 which has some results from a core practical investigating light intensity. Place the quadrat 5 m up the tape measure and repeat step 3. doc, 2. To find the wavelength of light using a diffraction grating; Variables. e. set up photosynthometer; leave for 5mins. record volume of gas produced. Leave for five minutes for the pondweed to acclimatise to the new light intensity. 5 Core Practical: Investigate the effect of light intensity on the rate of photosynthesis 2c, 2f, 2g 4a, 4c 6. measure and calculate rates of photosynthesis. Choose an area with a clear gradient of light intensity, i. Learning objective: Investigate the effect of light intensity on the rate of photosynthesis using aquatic organisms such as pondweed Feb 15, 2020 · Revision booklets and the accompanying PowerPoints for all of the core practicals in the biology section of the new Edexcel combined science GCSE (9-1). leave for 5 mins. A suitable During photosynthesis radiant energy from the sun (sunlight) is absorbed by green plants. 00. 6: Investigate biological specimens using microscopes including magnification calculations and labelled scientific drawings from observations, 1. 21 Leaf: Structure & Adaptations; 2. 26 Variation in Energy Requirements Core practical 10 Teacher sheet Investigate the effects of different wavelengths of light on the rate of photosynthesis Practical activities have been safety checked but not trialled by CLEAPSS. Core practical 16b encourages a high level of independent planning and research. Tes paid licence How can I reuse this? Photosynthesis - Edexcel Factors affecting photosynthesis - light intensity. Apr 28, 2019 · Hazel takes you through the set-up, procedure, risks and improvements for AQA's required practical for GCSE Biology on the effect of light intensity on the r The effect of light intensity on photosynthesis can be investigated in water plants. Temperature, carbon dioxide concentration and light intensity can affect the rate of photosynthesis. SAFETY Review the students’ risk assessments and discuss any safety considerations. Different organisms have different rates of respiration - the animals have a higher rate of respiration per gram than the plants, as they have a higher metabolic rate Feb 15, 2020 · Revision booklets and the accompanying PowerPoints for all of the core practicals in the biology section of the new Edexcel combined science GCSE (9-1). Count the number of bubbles given off in one minute. 1 Colour change and inferences that can made from the results: Tube 1 (leaf extract + DCPIP) colour changes until it is the same colour as tube 4 (leaf extract + distilled water). Moisture levels Both plants and animals need water to survive. The light-dependent reactions of photosynthesis take place in the thylakoid membrane and involve the release of high-energy electrons from chlorophyll a molecules; These electrons are picked up by the electron acceptor NADP in a reaction catalysed by the enzyme 2. GCSE; Edexcel; Photosynthesis - Edexcel Practical 6 - light intensity and photosynthesis. affects nthesis ed NA core practical 6: light intensity and photosynthesis. HT ONLY: Explain the interactions of temperature, light intensity and carbon dioxide concentration in limiting the rate of photosynthesis . add half spatula of sodium hydrogencarbonate to water (to provide CO2) 5. g. 6 Explain how the rate of photosynthesis is directly As light intensity increases, the rate of transpiration increases; This is shown by the bubble moving a greater distance in the 30 minute time period when the lamp was placed closer to the leaf; Transpiration rate increases with light intensity because more stomata tend to be open in bright light in order to maximise photosynthesis 5. Green plants use this energy to make the carbohydrate glucose from the raw materials carbon dioxide and water. Learn. 2. Answers. Gather data from your class to find the mean number of plants at each point along the transect. 5 Core Practical: In Jul 16, 2023 · CB6b - Light Intensity & Photosynthesis CB8d - Respiration Rates CB9b- Quadrats & Transects. Humidity affects rate because it affects the rate of diffusion and evaporation by decreasing concentration gradient between plant and the atmosphere. 19 Photosynthesis Equations; 2. Aim of the Experiment. 42B Leaf Adaptations for Gas Exchange; 2. Edexcel core practical- Light intensity and rate of photosynthesis. This will allow students to cover a wide range of practical skills and meet any or all of the CPAC criteria with a single investigation if necessary. Green plants and algae use light energy to make glucose and oxygen from carbon dioxide and water This is because as the light intensity increases, the rate of photosynthesis increases; At a certain point, light is no longer the limiting factor and so an increase in light intensity (decrease in the distance) will not result in an increase in photosynthesis. 2 The Role of ATP in Photosynthesis; 5. Feb 5, 2024 · Revision booklet and an accompanying PowerPoint for the CB6 core practical all about light intensity and photosynthesis. 13B Investigate the use of chemical reagents to identify starch, reducing sugars, proteins and fats and more. The sheet also includes some exam style questions on the effect of light intensity. Edexcel Core Practicals. My PowerPoint slides include: 2. 6 Absorption & Action Spectra; 5. Conclusion of light intensity practical? Paper 1: Bioenergetics: Photosynthesis. as in the diagram. Video: Core Practical: investigating enzymes and calculating the rate of reaction • Describe how to conduct a rates of reaction investigation on the effect of pH on amylase • Calculate and plot the rate of reaction Video: Core Practical: food tests • Describe how to use a chemical reagent to test the presence of a food group in a food sample 5. Count the number of plants and record it in a table as seen below. It also helps students complete thei Feb 15, 2020 · Revision booklets and the accompanying PowerPoints for all of the core practicals in the biology section of the new Edexcel combined science GCSE (9-1). 5 Core Practical: Investigate the effect of light intensity on the rate of photosynthesis. me le ph ax ws dz kn jn cv rn