Essay
Unit 4 - D3 evaluate the accuracy of the measurements taken
- Institution
- PEARSON (PEARSON)
This is my D3 task for my distinction graded unit 4 assignment
[Show more]
Content preview
Unit 4 – scientific practical techniquesD3 – Evaluate the accuracy of the measurements taken
No matter how accurate an experiment can be, there is always a new instrument or technique that is
available or could be used to make the experiment that little bit more accurate. And so, evaluating
each experiment carried out can show for future use, what better ways there are to reduce errors
and have the most accurate results possible.
In the microscopy experiment, the sterile cotton swabs were relatively accurate. They were
placed into a sealable plastic bag that allowed no air or particles to enter that could possibly disrupt
the accuracy of our findings. The sterile cotton swabs also had long handles as well as being one
ended, with the cotton facing towards the bottom of the plastic bag. This meant if anyone did by any
chance touch the cotton swab we were going to use for the experiment, only the handle would have
been touched allowing the cotton swab to be particle free. However, to make the experiment
slightly more accurate, using cotton swabs that were individually packaged would be more
beneficial. This means that only one person opens that packet and only one person uses the cotton
swab inside, leading to very little or no cross contamination occurring and therefore very accurate
results.
The light microscope within the microscopy experiment was as accurate as possible within a college
environment. With the light microscope having the 40x objective, cheek cells were able to be visually
seen and measured using the eye piece graticule and then the correct calculations could be carried
out to find out the real size of the cell. However, one way this experiment could be even more
accurate would be if there was the availability of being able to carry out oil immersion with the 100x
objective. This would not only allow the cheek cell to be in better view to get a correct measurement
read, but it would also allow for finer details to be visually seen. An even more accurate alternative
would be an electron microscope as edge to edge it can be seen where the cheek cell is and so the
longest length can be accurately measured.
…………………………………………………………………………………………………………………………………………………….
Thank you for previewing the example, feel free to buy the singular task, or the Unit 4 bundle xxx
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller kacieleax. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £2.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
60281 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now