NZQA Expiring unit standard
18974 version 5
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Title
Demonstrate knowledge of chemical change
Level
1
Credits
2
Purpose
People credited with this unit standard are able to: describe
chemical and physical changes; describe chemical changes;
and describe how changing factors affect the rate of chemical
reaction.
Classification
Science > Chemistry
Available grade
Achieved
Outcomes and evidence requirements
Outcome 1
Describe chemical and physical changes.
Range
two chemical changes, two physical changes.
Evidence requirements
1.1
The description identifies each change as being chemical or physical.
1.2
The description identifies features that indicate whether each change is
chemical or physical.
Outcome 2
Describe chemical changes.
Range
chemical changes include – neutralisation, rusting, burning, precipitation;
evidence of two chemical changes is required.
Evidence requirements
2.1
The description identifies the reactants or products.
2.2
The description outlines changes in properties.
NZQA National Qualifications Services
SSB Code 130301
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
18974 version 5
Page 2 of 2
Outcome 3
Describe how changing factors affect the rate of chemical reaction.
Range
factors include – temperature, concentration, surface area, reactivity, prevention
methods;
evidence of two factors is required.
Evidence requirements
3.1
The description links the changing factors to the rate of chemical reaction.
This unit standard is expiring. Assessment against the standard must take place by
the last date for assessment set out below.
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
26 February 2002
31 December 2012
Review
2
30 November 2010
31 December 2012
Rollover
3
20 October 2011
31 December 2012
Rollover and
Revision
4
20 September 2012
31 December 2016
Rollover
5
22 May 2014
31 December 2016
Consent and Moderation Requirements (CMR) reference
0226
This CMR can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Please note
Providers must be granted consent to assess against standards (accredited) by NZQA,
before they can report credits from assessment against unit standards or deliver courses
of study leading to that assessment.
Industry Training Organisations must be granted consent to assess against standards by
NZQA before they can register credits from assessment against unit standards.
Providers and Industry Training Organisations, which have been granted consent and
which are assessing against unit standards must engage with the moderation system that
applies to those standards.
Requirements for consent to assess and an outline of the moderation system that applies
to this standard are outlined in the Consent and Moderation Requirements (CMR). The
CMR also includes useful information about special requirements for organisations wishing
to develop education and training programmes, such as minimum qualifications for tutors
and assessors, and special resource requirements.
NZQA National Qualifications Services
SSB Code 130301
 New Zealand Qualifications Authority 2016