Easy to understand notes to study when preparing for you Life Sciences Practical. All you need to know to ace that Practical!
Notes were made in 2020. Matric IEB standard.
Practical Notes ● When asked to name or list the variables,
be sure to include the units (eg. cm3 or
Rachel Otter C)
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Independent variable
The Hypothesis
➔ The researcher chooses to change it
➔ Prediction
➔ It isn’t affected by the other variables
➔ Statement
➔ Include both variables and the Dependent variable
relationship between them
➔ Dependent on other factors
➔ No reason needed
➔ Variable that is observed or measured
Experiment vs Control Fixed Variable
➔ Experiment - gets all the factors
➔ Kept constant throughout the
INCLUDING the factor being tested
experiment
◆ Eg: contains glucose
➔ Eg. same age group, same type of plant,
➔ Control - gets all the factors E
XCLUDING
same environment, same amount of
the factor being tested
water
◆ Eg: NO glucose
➔ Explain if necessary
➔ Purpose: Compare a known negative
◆ Fair test and accurate results
result
➔ Measured carefully with syringe up to
exact line & made sure there were no air
Additional Skills
bubbles
Sections → “cut”
➔ Longitudinal section
➔ Cross section
◆ AKA Transverse section
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