The effect of pets on the diversity of plants in a garden lawn. Explain your hypothesis based on the theory directly under the statement you have just made. 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. Conclusion: state the conclusion that you have made in one sentence, bold , and then proceed to explain that conclusion based on theory. ? However, you must never blame the accuracy of your measuring tools — to scientists, this is a terrible excuse. For example, An experimental study on the rate of reaction dependent variable of rennin variable kept constant on different percentage concentrations independent variable, milk concentration is what we are changing of full cream milk. If enzyme reactions are thought to cause the decay this will make for another research pathway.
On the left column, what you could have improved, on the right, an explanation as to how you could improve this in the future. Controlling these factors will be a challenge but might be possible by washing in diluted antiseptic solution. Of course controlling other factors which are well known to affect heart rate will be one of the challenges of an investigation into this topic. Levels of performance are described using multiple indicators per level. Sorry, but copying text is forbidden on this website! Personal engagement This criterion assesses the extent to which the student engages with the exploration and makes it their own. Repeat this procedure 5 times for each temperature of water bath.
Some diseases spread through direct contact, others are transmitted by an insect vector. This might involve the use of a data logger, or perhaps a titration using bromothymol blue. Error bars and their explanation underneath the graph e. In order to demonstrate focus on the issues at hand. The slice placed in distilled water is expected to become heavier.
Hope this helps a bit. The teacher will read and approve every problem question - once it is's approved it is added to which everyone can see and if it's not approved because it's too simple, too complex, not ethical, or lame. The class grade for the final I. Thermal scarification is covered in detail in the next idea. The effect of mild stress, e. David Faure 10 August 2018 - 08:35 Dear Trevor, Thanks for your question.
Biological explanations could look at the way we grow, and if the brain changes size at the same rate as the lungs. Of course reactions will happen more slowly at cold temperatures, but there may be inhibitors or catalysts in the environment such as plant hormones, acids or oxygen. They should be meaningful, and not superficial. Of course the ideas are just that and all the details will need to be explored and evaluated by students during their investigations. It covers a wide range of biology-related topics such as biological chemistry, biophysics, botany, cytology and histology, environmental studies, microbiology, microscopy, and zoology.
Research Question How does the temperature affect the time taken for the Triphenyl tetrazolium chloride to be reduced in actively respiring yeast cells? This is an interesting topic of investigation which relates to osmosis and ecology. The precise meaning of the command terms used in the criteria can be found in the glossary of the subject guides. Take qualitative observations such as uncertainty of equipment and initial color 6. Once a problem question has been approved, a student can't change it without discussion with the teacher. Bananas lend themselves to this because their skin changes colour.
While it is not allowed to use body fluids testing your own hair would be acceptable. All your headings for tables and graphs should be very specific as well. Does ascorbic acid get converted to sugar as part of the ripening process of a fruit. Can you promote the production of catalase in a carrot by growing it in certain conditions? Observations: directly under your raw data, with at least 2 non-superficial observations you made. Examining a factor which affects vital capacity, or tidal capacity of the lungs. The germination of the seed is when the embryo resumes growth, bursting through its encasing The Seed Biology Place 2009. Lets be generous and say 5 marks is possible.
The way in which bacteria might spoil food could be influenced by the origins of the food, it's cultivation, organic or not, and any treatment after harvesting, or during transport. This was the case with the slice left in salty where revealed by the data. Alternatively, a lower temperature will make the time to reach the end-point slower. Of course the underlying processes are controlled by enzymes, or the fruit ripening hormone ether. This investigation is interesting as it relates to the shelf life of food and also the quality of food after the processing. If a student is struggling to achive a grade 4 then a safe simple experiment is a good idea, so long as it meets these criteria. A website devoted to data use in schools,.
For example: What effect will the percentage concentration of full cream milk measured from 60% to 100% concentration in 10% intervals have on the rate of reaction of rennin and milk measured in time taken in seconds to form clots at a temperature of 35 °C? Possible specific research questions could address temperatures of different parts of the skin, related to hair, or muscle, or blood circulation. The sciences are taught practically. Scarification is often done mechanically, thermally, or chemically. Every year the examiners' report mentions problematic Investigations, those which are unethical, or standard labs which are not applied to any specific interest. I would be grateful for any comments or ideas! Any treatment of the data must be appropriate to the focus of the investigation in an attempt to answer the research question.
The choice of physiological features of the body could include heart rate, or pupil size, or skin redness. The investigations may be laboratory based or they may make use of simulations and data bases. This mixture should be prepared 2 hours in a beaker before the experiment is conducted ii. The effect of a warm up on the maximum heart rate or maximum speed achieved in a standard test The role of a warm up in sport is clear. It is a white crystalline powder that can be dissolved in water, acetone and ethanol. State what you are measuring your dependent variable in, is it seconds? One possible solution is to measure another or some other factors about the body and look for a correlation.