Ib biology ia example. biology IA examples : IBO 2019-01-08
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B: Internal Assessment Criteria
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. Investigation into the effect of regular exercise on the increase in pulse rate after a short period of exercise. Consider exactly why you chose your independent and dependent variables and the values of the former. Triphenyl Tetrazolium Chloride solution 31 cm3 iii. If you are still not dissuaded then be sure to collect enough data and try to be analytical, don't mix types of music and tempos of music and try to keep the investigation to some biological cause or effect. Then, for the next section I will repeat with another different random 10 students. In the same second squirt Pipet filled with 1ml of Liver solution into test tube with 10ml of Hydrogen Peroxide h.
On the other hand, 1. Leave for several minutes to the temperature of the water bath. Out of the two, however, 0. All other substrates, such as soil, would naturally have a low salt concentration, altering the concentration the seeds would be exposed to. The there is relatively low standard deviation for 50˚C, 55˚C, 60˚C and 70˚C except 65˚C. A table of all your variables independent, dependent, controlled, and how they were achieved : It should be 2 columns, on the left, your variables, and on the right a brief explanation as to how you achieved it. The class grade for the final I.
Students perform the experiment for catalase from two different sources e. Spend as much time planning it as you possibly can — a well planned experiment will be one that is difficult to be critiqued. Average Number of Germinated Seeds 9 8 7 6 5 4 3 2 1 0 0. With the split seed among the 0. In all these respects, water is essential for the germination of seeds. Try to explain what R squared is as well if you can.
Comments about data for three not allow for elimination of benefit from having the precision and accuracy of the different those other values that do five points of data five measurements are relevant here. Examining the effect of household cleaning products on the growth of house plants This could be a difficult investigation to do quantitatively unless there was a longer time period available to observe growth. Scarification involves weakening, opening, or otherwise altering the coat of a seed to encourage germination. 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? Given more time, it could be possible to repeat the experiment in order to collect more data. Observations: directly under your raw data, with at least 2 non-superficial observations you made. The type of respiration that occurs is called aerobic respiration.
The total number of germinated seeds was recorded each day for 10 days. There are lots of practical problems to overcome, most importantly how to change the soil so that it has different amounts of respiration. By testing people of different ages to see if there is a difference in their reaction time it may seem like a simple study, but there are a lot of factors which need to be controlled and it will be difficult to find enough participants to create a large enough data set. Of course there will be other factors to consider, for example local feature of the habitat where the plants are growing and the aspect of the flowers' location, not to mention grazing and grass cutting. This coat acts to protect the internal embryo from the elements, parasites and mechanical injury while it is still dormant Washington State University 1999.
After day four, many of the seeds began to germinate, with the tip of the root becoming visible. Lower concentrations will slow respiration because of a lack of substrate. A challenge is to work out the biological reasons behind you hypothesis, and it may be a good idea to branch away from toothpaste to test a specific chemical from the ingredients in the toothpaste. If you insist on trying this then be sure to cover the control of variables, there are a lot which can affect the heart. Dormancy is caused by a number of factors, including incomplete seed development, the presence of a growth regulator, an impervious seed coat, or a requirement for pre -chilling. Methodology: I recommend planning early.
How to write an excellent IB Biology Lab Report: a step by step guide
The controlled variables must be explicitly linked to your dependent variable e. Perhaps another research question will be better, something linked to hormones, or to physical activity. Have partner 2 place tube inside 100ml graduated cylinder i. Every year the examiners' report mentions problematic Investigations, those which are unethical, or standard labs which are not applied to any specific interest. Some plants grow well in coastal soils with high salt concentrations but others don't. And finally, Limitations: what were the limitations of your experiment? Evaluation: in a table format.
Thus, it is important to maintain water, oxygen and temperature and optimum levels for germination Clegg 2007. David Faure 10 August 2018 - 08:35 Dear Trevor, Thanks for your question. For the Australian climate, this is best done from March to May, as they have a germinating temperature of 5-20°C Moore 1982. These results alsoindicate that the distilled water was more hypotonic than the tap water compared to the potatocells as the water mass gained by the potato slice was considerably higher in distilled water. Remember, this is half the limit of reading, so for a mercury thermometer it should be ±0. Salinity and seedlot affect rough bluegrass germination.
One idea would be to make a series of soils using active compost and sand. Water baths at temperatures 50˚C, 55˚C, 60˚C, 65˚C, 70˚C vi. Here there are really two independent variables, source and pH. 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. Hypothesis: Give a one line hypothesis stating what you think will happen this should be in bold.
