Biology paper 61... DONE

[ZainH]

Repeat the experiment is only used when numbers are involved, I think. I wrote ensure same size and length, and use larger number of pieces, since he said improve "RELIABILITY" not "ACCURACY"

Er okay. I might've lost a mark there then :S
For the question where you had to measure the diamater of that circle.. did it ask for it in cm or mm? Please say cm..

 

[phantom]

Er okay. I might've lost a mark there then :S
For the question where you had to measure the diamater of that circle.. did it ask for it in cm or mm? Please say cm..

No they didnt mention, and at the end of the answer space, there was no specific unit, I measured horizontally and got 7.0 cm

 

[Micro961]

Last question's answer is: It's continuous variation affected by the environment.
Measuring diameter, i guess u either had to measure all (not just inside) but they didn't say in the question so i guess there is a range for the measurement.
for the improve experiment i wrote: repeat experiment, same sized cut (not sure about it), increase duration and use more than 3 onion leaves. I know it's only two marks but because they didn't say write only two, i wrote more so they'll maybe count the right ones even if it's written the last.
what did u do for question above improve experiment which was 3 marks?

 

[ZainH]

No they didnt mention, and at the end of the answer space, there was no specific unit, I measured horizontally and got 7.0 cm

OH GOD THANK YOU!
I did the same, and then changed both measurements into cm for magnification.
THANK YOU THANK YOU! I hope you remember correctly otherwise I'd lose around 3 marks there :s

 

[Jisu]

Did it say measure in mm? I wrote in cm... I got 7.1cm.

it shud always be in mm
i got 72 mm

 

[Addoozz]

Repeat the experiment is only used when numbers are involved, I think. I wrote ensure same size and length, and use larger number of pieces, since he said improve "RELIABILITY" not "ACCURACY"

sorry, i did not write "accuracy", i just remembered writing reliabiliy

 

[ZainH]

Last question's answer is: It's continuous variation affected by the environment.
Measuring diameter, i guess u either had to measure all (not just inside) but they didn't say in the question so i guess there is a range for the measurement.
for the improve experiment i wrote: repeat experiment, same sized cut (not sure about it), increase duration and use more than 3 onion leaves. I know it's only two marks but because they didn't say write only two, i wrote more so they'll maybe count the right ones even if it's written the last.
what did u do for question above improve experiment which was 3 marks?

Oo it could be continuous variation was well.. Hm.
For that 3 mark question you had to explain osmosis occurring. In one it was water molecules entering the leaf, and the other was leaving the leaf.
Just had to give more details .

 

[phantom]

OH GOD THANK YOU!
I did the same, and then changed both measurements into cm for magnification.
THANK YOU THANK YOU! I hope you remember correctly otherwise I'd lose around 3 marks there :s

Don't worry, Iam sure, but for the magnification we had to use mm, Right??

 

[Micro961]

They didn't mention but you had to convert to mm because they said the actual length in mm..

 

[ZainH]

it shud always be in mm
i got 72 mm

If it didn't specify I don't think they would cut marks.

 

[Jisu]

for da histogram...did u take da frequency density like in math or just make a bar chart??

 

[Micro961]

Oo it could be continuous variation was well.. Hm.
For that 3 mark question you had to explain osmosis occurring. In one it was water molecules entering the leaf, and the other was leaving the leaf.
Just had to give more details .

i explained the first two, but the last one which was in air i didn't know what to write!!

 

[Jisu]

If it didn't specify I don't think they would cut marks.

But wasnt da actual thingy in mm too??

 

[ZainH]

They didn't mention but you had to convert to mm because they said the actual length in mm..

Lets see, actual length = 5mm
Length I measured (in mm) = 71mm

71/5= 14.2

The way I did, actual length = 0.5cm
Length I measured (in cm) = 7.1 cm

7.1/0.5=14.2

I don't think it mattered which unit it was converted into.

 

[ZainH]

i explained the first two, but the last one which was in air i didn't know what to write!!

You didn't have to write anything for the last. It said state what happens in those which you observed a change.. I just wrote for the first 2.

 

[phantom]

it shud always be in mm
i got 72 mm

No, you can use cm or mm, where did you get that information??

 

[Jisu]

i explained the first two, but the last one which was in air i didn't know what to write!!

I wrote it was soft bcuz of da moisture in da air..

 

[Micro961]

And for the graph.. what was in the x and y axis?

 

[Jisu]

No, you can use cm or mm, where did you get that information??

my bio teacher

 

[ZainH]

I wrote it was soft bcuz of da moisture in da air..

But then wouldn't the onion leaves naturally be soft? Since the grow in AIR.
It said mention those in which a change took place.. I don't think there was any change in the 3rd one.