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How to get accurate *more* accurate result from this expmt?

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How to get accurate *more* accurate result from this expmt?

Postby Meerul264 » Mon May 16, 2011 8:43 am

How to get more accurate result from this experiment?

The instructions:

1. Remove the potato tissue from the solution and blot it gently to remove the surface liquid.
2. Cut 4 strips of potato, exactly 70mm long by approximately 10mm wide.
3. Put a strip into each of the salt solutions, A, B, C, and D so that the strips are completely covered.
4. Leave them for at least 25 minutes and during this time, start Question 2.
5. After 25 minutes, remove the strip from solution A, blot it gently, then measure the length of the strip to the
nearest 0.5mm.

Record the measurement in table 1.1.

[I've recorded it]

Suggest three ways in which this investigation could be more reliable?

[This is where I'm blank, I think one of the answer is to repeat the experiment and get the average result]
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Postby Meerul264 » Mon May 16, 2011 8:44 am

Please I need the answer >.<

Practical exam tomorrow and teacher said this will come out! [since this is the only
practical that we've done so far].
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Re:

Postby Meerul264 » Mon May 16, 2011 8:47 am

Please I need the answer >.<

Practical exam tomorrow and teacher said this will come out! [since this is the only
practical that we've done so far].[/quote]

Meerul264 wrote: Knowledge talks, wisdom listen.
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Postby JackBean » Mon May 16, 2011 12:41 pm

First, we have our lifes as well. It's not our bad, that you came only one day before your exam. And noone is sitting here just to give advices to desperite students.
Second, unless you tell us, what were you actually doing, we can hardly give you any advice, how to improve your experiment...
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.
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Postby Meerul264 » Mon May 16, 2011 2:05 pm

Wow. I'm sorry I wasn't desperate or anything. That was just a question that I wasn't sure with the answer.

I do not take it seriously, whether you guys answer my question within the last hours or not answering at all. I thought this site was for knowledge sharing, despite of our behavior or immaturity or maybe of what you call 'desperate'.

*Sigh*. I was just singed in for discussion and knowledge and this is what I get.

Simple: the question ask how can I get a better accurate result?

My possible answers: 1. Repeat a second set of experiment and find
the average result.
2. Repeat the experiment on the same solution with different
set of potato of different size.
3. Extend the duration of time of the potato dipped in each solution.
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Postby JackBean » Mon May 16, 2011 3:27 pm

3 posts in 5 minutes look a little desperate, but never mind ;)

OK, 1 and 2 look fine (technical and biological replicate, respectively), 3 in my opinion would not make your results more accurate, only more data.
But my point was, that if you will not tell us, what you measure and what's your point, we cannot give more precise advices
http://www.biolib.cz/en/main/

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