Better still the volume of water evaporated divided by the time taken. What is the outcome of the process? Practical 7 - Measurement of transpiration rates using potometers This graph shows the changes in the rate of transpiration for an experiment with different humidities. The distance a pigment travels depends on the paper, the solvent and these forces. So although mass is important so will be shape as this will change the surface area if it is different. Students have opportunities to design investigations, collect data, develop manipulative skills, analyse results, collaborate with peers and evaluate and communicate their findings. Unfortunately, the toad has exploded in population size because it is not preyed upon due to a toxic gland that will kill its predators.
Discuss your notes and your findings. Questions may involve describing, explaining or calculating based on the data provided. Read the top level markband. The Options are varied and contain multiple subtopics and it is unlikely that any single teacher is an expert in all of them. Yes, it forms the major part of the paper but the questions in Section A are equally important. I had a big smile when I saw liver being asked for the 6 point question.
Students will develop a strong foundational understanding of the nature of science and describe how newly acquired knowledge leads to new and different questions The site works the best using Google Chrome. Consider the impact on stakeholders. The changes that transform ecosystems over time. In this case about 6 or 7 scale bars so 60 - 70 µm length. Was giddy when I saw aphids. As you are drafting your response, predict how points will be awarded on the mark scheme. Each mesocosm would be given a different lighting regime e.
This investigation may involve a hands-on approach, use of data-bases, modelling, simulation or a hybrid. In order to see any pattern in the results there needs to be a range of buffer solutions covering pH5 to pH9 at least. I made detailed notes from the textbook and the syllabus for each topic and then condensed them down into flashcards. I have created a list of all the things you need to be able to draw with diagrams. Familiarising yourself with these questions and the sorts of thing that we asked is an essential part of any preparation and can give you some idea of what to focus on during practical classes. Be sure to use legible handwriting that is dark enough to read from a scanned image. In what type of cell? This subreddit is for all things concerning the International Baccalaureate, an academic credential accorded to secondary students from around the world after two vigorous years of study, culminating in challenging exams.
? This is really a question about experiment design. The red dots show the average rate and the blue bars show the range of readings taken. Explain how you would set up an investigation of pH using buffer solutions. I will mainly be focusing on Section A of the paper but will talk you through a few things you can do regarding the Option. Paper 3 — The Breakdown Paper 3 comprises two sections; Section A is compulsory and you will most likely have two questions of which one will be data-based and the second will be based on at least one of the prescribed practicals you should have carried out during your taught course. You can choose whichever option you wish; however, you will be 100% responsible for covering a different option on your own. The pigments extracted were placed on the base line of some chromatogtaphy paper and a solvent ran up the paper revealing the three pigments as shown in the diagram below.
Many discoveries remain to be made and great progress is expected in the 21st century. This apparatus is used to test the rate of respiration with some insect larvae. So, narrow down the answer choices, and if you must. This will elevate your understanding of the Case Study. Play attention to the , so you actually address what the question is asking. There would need to be five identical mesocosms each containing the same organisms. Practical 4 - Separating photosynthetic pigments by chromatography.
This question allows you to write a reflection on what you said in the paragraph and finally what is your final reflection to the answer to the entire question. I would urge you to think very carefully before studying the Materials option. These flashcards can either be classic paper flashcards or digitally in an app such as Quizlet or StudyBlue. Outline some of the practical difficulties you might encounter in the construction of such a mesocosm, and suggest some precautions which might be taken to avoid harm to students or the animals in the mesocosm. This will help you to focus on what is required and which data are superfluous. This list is far from exhaustive; you may have done some of these experiments yourself or have done something similar. The Cane Toad was introduced in Australia in 1935 to control the Cane Beetle.
In class, we will complete one option together. This increases the rate of ventilation, without altering the mechanism. If you are careful, you can select or ask a teacher to help you select those questions relevant to the current syllabus from papers going back over a decade. Practical 4 - Separating photosynthetic pigments by chromatography. One night studying was sufficient. Paper 2 consists of data-based questions, short answer, and essay questions.