Pract

Question 1

Things to take note while writing tables

Answer 1

1. Indicate +- for increase, decrease
2. Standardise d.p.

https://docs.google.com/document/d/1sG942E4hsSUUBupFIWxzIaSQnrfX67mZtqmS5qHr5Cg/edit?tab=t.0 Page 1

Question 2

For anything regarding reaction speed, temperature round off to wat? why?

Answer 2

nearest second
(reaction time est 0.3s, impossible read, nearest 0.1s)

nearest 1deg celc
smallest division, thermometer

Question 3

Draw line graph if got obvious outlier then

Answer 3

1. plot (if within axes)
2. circle
3. label as (outlier)

https://docs.google.com/document/d/1sG942E4hsSUUBupFIWxzIaSQnrfX67mZtqmS5qHr5Cg/edit?tab=t.0 page 2

Question 4

axes need units?

Answer 4

no.

Marking Scheme

Axis
Scale
Coordinates
Line

Question 5

bar chart
things 2 take note

Answer 5

1. centralise label w/ bar
2. spaces btwn bars
3. same bar width
4. MUST START 0,0

https://docs.google.com/document/d/1sG942E4hsSUUBupFIWxzIaSQnrfX67mZtqmS5qHr5Cg/edit?tab=t.0 page 3

Question 6

histogram what to take note

Answer 6

1. X coord no need start w/ 0, Y coord MUST START 0
2. distinct categories
3. no data, dont plot anything

https://docs.google.com/document/d/1sG942E4hsSUUBupFIWxzIaSQnrfX67mZtqmS5qHr5Cg/edit?tab=t.0 page 4

Question 7

S4 Experiment errors

Answer 7

1. Specimen
2. Subjectivity
3. Surroundings
4. Set-up

Question 8

Specimen errors

Answer 8

1. genetic variability
2. organism grew diff env
3. suspension not homogenous

Question 9

Specimen Errors
g__ v__

1. format
2. how2 fix

Answer 9

genetic variability
1. When (experiment name), (?) obtained from different (?), that may be genetically different, result different (?, e.g. conc. of sucrose), causing inaccuracies in (what ure measuring), inaccuracies (final observation)
2. obtain specimen, single organism/genetic lineage

Question 10

Specimen Errors
o__ g__ d__ e__

1. format
2. how2 fix

Answer 10

organism grew diff env
1. When (experiment name), (?) obtained from different (?), that may have grown diff env, varying (?), result different (?, e.g. water potential), causing inaccuracies in (what ure measuring), inaccuracies (final observation)
2. obtain specimen, single organism growing similar env

very similar to genetic one

Question 11

Specimen Errors
s__ n__ h__

format
how2 fix

Answer 11

Suspension not homogeneous
1. When (experiment name), (describe how suspension is used in experiment.) (?) suspension may not uniform, different density/conc/? of (?) suspension in (?). Hence inaccuracies, rate (what ur measuring), inaccuracies, (final observation)
2. stir stock b4 using it

Question 12

analyse type qns

Answer 12

1. quote data
2. explain data

Question 13

application qns

Answer 13

> 1 mark -> must have link 2 syllabus