Paper 6 Tips and Tricks
Explain why the experiment was repeated.
To reject anomalies, to calculate mean, to increase reliability.
A control experiment is made to compare results clearly in
colour change experiments and to test for only one variable
or to make sure that change is due to one specific factor in
experiments like plants and enzymes.
If magnification is not included in differences and
similarities question, do not talk about size in your answer.
The student wanted to find more accurate optimum pH or
temperature for the enzyme, what should he do? Test at
smaller intervals between ..... and ....
Suggest why the container was left in water bath for (2)
mins before starting the experiment? To equilibrate
temperature
The only graphs where you have to draw free-handed are
enzyme graphs (whether question says or not), and if
question asks you to ofc.
Some controlled variables can be: 1) same temp. 2) Same
volume/concentration/amount/mass/size 3) same time 4) same species/type 5)
same type/size of apparatus 6) same speed and time of shaking
For control experiments: 1. boil enzyme {for enzyme experiments}
2.use glass beads instead of seeds or insects {for respiration and germination
experiments}
Sources of errors:
Explain why the experiment was repeated.
To reject anomalies, to calculate mean, to increase reliability.
A control experiment is made to compare results clearly in
colour change experiments and to test for only one variable
or to make sure that change is due to one specific factor in
experiments like plants and enzymes.
If magnification is not included in differences and
similarities question, do not talk about size in your answer.
The student wanted to find more accurate optimum pH or
temperature for the enzyme, what should he do? Test at
smaller intervals between ..... and ....
Suggest why the container was left in water bath for (2)
mins before starting the experiment? To equilibrate
temperature
The only graphs where you have to draw free-handed are
enzyme graphs (whether question says or not), and if
question asks you to ofc.
Some controlled variables can be: 1) same temp. 2) Same
volume/concentration/amount/mass/size 3) same time 4) same species/type 5)
same type/size of apparatus 6) same speed and time of shaking
For control experiments: 1. boil enzyme {for enzyme experiments}
2.use glass beads instead of seeds or insects {for respiration and germination
experiments}
Sources of errors:
