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2
marks
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a.
demonstration of safe and correct use of some equipment
b.
some appropriate readings or observations made
c.
some readings or observations recorded
d.
two or more correct units used
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b.
evidence of readings having been made — this ma\ he by teacher
annotation of the script.
c.
a simple table of results
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4
marks
|
a.
all equipment used safely and correctly
b.
majority of readings accurate and appropriately recorded
c.
sufficient readings taken including. where appropriate, repeat
readings
d.
all units correct (except occasional omissions)
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b.
75% plus.
accurate and recorded
c.
for
example. in a simple pendulum experiment eight to ten different lengths
timing several oscillations twice or three times.
Measuring the diameter of a wire three readings repeated on at
least two sections of the wire
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6
marks
|
a.
readings given to appropriate number of significant figures
b.
readings taken with suitable precision
c.
clear, organised and accurate presentation of results and
observations
d.
identification of
significant source(s) of error
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a.
evidence that the candidate is aware of the
potential error in the reading and uses this to guide the number of
significant figures quoted.
c
c. clear
table of results with column headings,
error estimations and
correct units.
d.
some
statement in the discussion, or elsewhere, that the candidate is
aware of the largest source of error.
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8
marks
|
a.
description of action proposed to minimise errors
b.
implementation of plan to minimise errors where possible
c.
checks of readings or observations which appear to be inconsistent
or suspect
d.
calculation of mean values of repeat readings
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a.
for e\ample. lea~
ing
thermometer in the liquid o hilst taking a reading, using a fiducial mark
in a oscillation investigation or limiting the current through a wire to
avoid a change in resistance.
c.
any anomalous data checked or explained
d.
mean values, correctly calculated and quoted to an appropriate
number of significant figures.
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