Physics, Chemistry and Biology: Post your doubts here!

[Rockzstar]

how should we know the plotting of graphs in X-axis and Y-axis ???

 

[ZaqZainab]

how should we know the plotting of graphs in X-axis and Y-axis ???

Always the first column is X axis

 

[Rockzstar]

Always the first column is X axis

oh thank U sO mUCh

 

[ZaqZainab]

You are welcome

 

[ZaqZainab]

Damn it what in the world do they mean bu tally
I guess IGCSE has there own meaning for it http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Biology (0610)/0610_s12_qp_61.pdf
how do i do question 3 (c) ii Tally I dunno how to do this and i have got my exam tomorrow

 

[Tim Diamond]

What is a buffer in biology?

 

[Iridescent]

ZaqZainab


^^example of a tally chart. In the question, they have given the ranges. e.g, if there are six worms in the first range, you draw 4 line and cut them (the cut represents the 5th line) and you put one more line for the sixth worm. Its like the lines for mark7 in the above example.

Hope you understood

 

[Iridescent]

What is a buffer in biology?

Buffer solution is added to maintain the pH of any solution in experiments.

 

[ZaqZainab]

ZaqZainab
View attachment 25061

^^example of a tally chart. In the question, they have given the ranges. e.g, if there are six worms in the first range, you draw 4 line and cut them (the cut represents the 5th line) and you put one more line for the sixth worm. Its like the lines for mark7 in the above example.

Hope you understood

I got it actually i knew it but what does the marking scheme say :/ It is like +1 +2 +3.... Sorry about disturbing yo but i have my exam tomorrw

 

[Rockzstar]

Can some1 please upload the main functions of the parts of leaf ??

 

[Iridescent]

I got it actually i knew it but what does the marking scheme say :/ It is like +1 +2 +3.... Sorry about disturbing yo but i have my exam tomorrw

The method is the same i.e., the lines one. The +1 or +2 are those which you are measuring so your measured length might be different from mine by a few mm. Because of this they can fall in different ranges. So, if from the measured worms, only 2 fall in the 11.0-12.9 group, two more lines will be there along with those whose measurements are already given. Hope you are clear now.
Btw, i too have my exam tomorrow. Plz pray for me and gud luck for your exam.

 

[ZaqZainab]

Please give examples of safety measures in testing for food tests ??

Use of water bath,Test tube holder,Safety spectacles,use of lab coat,tie the hai back i hope this helps

 

[ZaqZainab]

The method is the same i.e., the lines one. The +1 or +2 are those which you are measuring so your measured length might be different from mine by a few mm. Because of this they can fall in different ranges. So, if from the measured worms, only 2 fall in the 11.0-12.9 group, two more lines will be there along with those whose measurements are already given. Hope you are clear now.
Btw, i too have my exam tomorrow. Plz pray for me and gud luck for your exam.

Thank you so much I hope yo pass in flying colors

 

[Mr Bunghole]

If someone could help me with question 4 of physics p6, s08. That would be really appreciated

Thank you.

 

[ZaqZainab]

If someone could help me with question 4 of physics p6, s08. That would be really appreciated

Thank you.

Could you please post the Link

 

[tiki-taka]

Ohk in markschemes they say us to mention da volume of reagent added....wat shud we use..or how many cm3 of iodine,benedict,biuret nd ethanol should we use in any experiments......fast sum1.please.....exam tomoro....

 

[tiki-taka]

In a aquatic plant leaf wch floats..the stomata is at upper emidermis..but wer is the palisade nd spongy mesophyl cells

 

[Tim Diamond]

Buffer solution is added to maintain the pH of any solution in experiments.

Thank you

 

[MMK95]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Chemistry (0620)/0620_s12_qp_11.pdf
pls explain question 16........

 

[Rockzstar]

how to improve accuracy of an experiment ???