Evaluation - Eb - evaluation of primary data Identify any outliers you had in your results. Make sure that your work is adequately spell checked and proof read.
You also need to refer to your error bars. Collect data over a good range and repeat to check reliability. Take care with your spelling, grammar and punctuation, and use scientific terms where they are appropriate. Collecting Data - C - range and quality of primary data This is easy to get good marks in.
You need to talk about the Ocr 21st century additional science coursework scatter of your results. Remember to show all units correctly e. Do some tests to check that you have chosen good ranges to test — report the results.
Will hydrogen always produce a squeaky pop? Secondary data Your investigation should be based on the data you collect from your own experiments.
Strategy Decide exactly what you want to investigate. Explain how much your hypothesis can be explained by the science behind it. What might have happened for this to be the result? Interpreting data Use tables, charts, graphs or calculations to show any patterns in your results.
Evaluation - Ea - evaluation of apparatus and procedures For this section, you need to describe limitations caused by your techniques and equipment. Your report must make use of full scientific terminology in order to gain 8 marks. Teachers may request an A2 size copy of this poster by sending the poster title, their school name and address to OUP at enquiries.
Look at their scatter and error bars, as well as where their graph crosses the x axis. Will water always move to an area of higher sugar concentration to reach equilibrium?
Hope this all helps: Small error bars mean increased reliability as all your repeats are close together. Include all your key science language. Link this to your preliminary experiments that you did.
This can lose you lots of marks if there is not enough scientific terminology within your investigation.
If you have put multiple sets of data onto one graph to show comparisons, you need to make sure that each data set is easily identified and there is a key to show which data is which.
This needs to be really detailed for you to gain good marks for this section. This is really simple. You must also complete a full and appropriate full risk assessment.
Say what conclusions you can make from your data. You can also justify why your method is the best one and that there are no realistic ways to make it any better. You must explain why you chose the range.
Are they close together or far away? You need to collect a good range of data, justifying your choice of range talk about your preliminary work and have a good amount of repeats. Look at each point individually and say if it is accurate and reliable. Think about any things factors which might affect your results, and how to control them.
Look at the results as you go along — they may show that you should change your plan, and test more or different values. Tip Keep detailed notes of each stage of your planning and work. Choose people that have done the same experiment as you. Consider how much data you need to collect, and plan repeat experiments to check for reliability.
Check each result as you get it to see that it fits in with others you already have — if not, consider whether you need to repeat it to check.
You also need to say how the change will affect the outcome.My science coursework (ocr gateway additional science p4) exam a (86 ums).
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Apr 03, · THIS VIDEO IS FOR OCR 21st CENTURY SCIENCE (From ) This video was based on a mind map produced by Lucky and Vincent, two of my students. OCR 21C REVISION: B4 in under 20 minutes.Download