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OUTCOME 2
Solve problems related to Building Blocks.
Performance criteria
(a) Relevant information is selected and presented in an appropriate way.
(b) Information is accurately processed using calculations where appropriate.
(c) Conclusions drawn are valid and explanations given are supported by evidence.
(d) Experimental procedures are planned, designed and evaluated in an appropriate way.
(e) Predictions and generalisations made are based on available evidence.
Evidence requirements
Evidence of an appropriate level of achievement from a closed-book test with items covering all of the above performance criteria.

OUTCOME 3
Collect and analyse information related to Intermediate 2 Chemistry obtained by experiment.
Performance criteria
(a) The information is collected by active participation in the experiment.
(b) The experimental procedures are described accurately.
(c) Relevant measurements and observations are recorded in an appropriate format.
(d) Conclusions drawn are valid.

Evidence requirements
A report of one experimental activity is required covering the above performance criteria and related to one of the following experiments:
 the effect of concentration changes on reaction rate
 the effect of temperature changes on reaction rate
 electrolysis

The teacher/lecturer responsible must attest that the report is the individual work of the candidate derived from active participation in an experiment involving the candidate planning the experiment; deciding how it is managed; identifying and obtaining the necessary resources, some of which must be unfamiliar; carrying out the experiment. Depending on the activity, the collection of the information may be group work.

Evidence submitted in support of attainment of PC (c) must be in the format of a table or graph(s) as appropriate. Conclusions drawn should be justified by reference to supporting evidence and include an evaluation. The evaluation should cover all stages of the experiment, including the initial analysis of the situation, and planning and organising the experimental procedures.

b) As experiments will follow a given procedure or method there is no need for a detailed description. The procedure, or the steps in the procedure, should be described briefly in outline. The impersonal passive voice should be used. The following should be used as appropriate:
 aim of the experiment
 a labelled diagram, description of apparatus, instruments used
 how measurements were taken or observations made
 comments on safety.

c) Readings or observations (raw data) should be recorded using the following as appropriate:
 a table with correct headings and appropriate units
 a table with readings/observations entered correctly
 a statement of results.

d) Conclusions should contain at least one of the following:
 the overall pattern to readings
 the trends in analysed information or results
 the connection between variables
 an analysis of the observations.

Conclusions should also include evaluation of the experimental procedures and could make reference to one of the following:
 effectiveness of procedures
 control of variables
 limitations of equipment
 possible improvements
 possible sources of error.

Qualified Chemistry teachers at all levels across the Edinburgh, East Lothian, Westlothian, the Borders and Falkirk areas. Home Tuition Scotland can help your child achieve Chemistry exam success.

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