Chemistry
Year 11
Extended Response Task 1 (ERT1) – Corrosion
Assignment
T 4 2012
Term 3, 2012
Knowledge
A B C D E
Application
A B C D E
Important Dates
Explanation
A B C D E
Overall
Signature(s)
Handed out
Monday 30th July (week 4)
Student:_____________
Draft Due
Friday 10th August (week 5)
Student:_____________ Teacher:____________
Due Date
Friday 25th August (week 6)
Student:_____________ Teacher:____________
Assessment Conditions
Length
800-1000 words (discussion, evaluation, recommendations, conclusion only)
Conditions
Individual report, unsupervised
This assignment is to be completed as a scientific essay, you will have three weeks from
when the assignment is handed out to complete it and hand it in. This will include four
class lessons in that time to work on your assignment.
This assignment is handed out on the 30th of July, and will be due on the 25th of August.
You are required to hand in one draft before the 10th of August.
Absence across any of the in-class assignment lessons will be up to the student to make
up either in their own time, or organise with the teacher a make-up session before the due
date.
DECLARATION OF AUTHENTICITY OF STUDENT WORK
I, _____________________________, declare that all work completed by me in this assignment is
entirely my own and that I have acknowledged, through appropriate referencing and quotations, any
sources from which I have taken information or ideas. I understand that plagiarism or collusion will
impose strict penalties.
Date: ____/____/________
Student Signature:_____________________
EXTENDED REPORT TASK
What causes the corrosion of iron and can it be prevented?
Your assignment should be professionally presented and written as a scientific essay. It should
include the following:

A cover sheet including details such as your name, teacher’s name, due date, task name
and word count as seen in the Word Count dialogue box of Microsoft office word
documents

An introduction which defines the term “corrosion”, provides some data on the cost of
corrosion to society and outlines the topics to be presented in the body of the report.

A body which includes discussion of the chemical concepts related to the corrosion of
iron, including the following:
- A description (including balanced chemical equations and E0 values) of the chemistry
of corrosion of iron.
- A description of how the corrosion of iron is accelerated by the presence of a salt
solution.
- A description (including balanced chemical equations and E0 values) of some
measures that can be used to reduce the corrosion of iron such as: The use of a sacrificial anode.
 The addition of oxygen scavengers such as sodium nitrite to water used
in industry; for example in power station cooling water.
 The alloying of iron.
 Other measures can be also discussed
Diagrams and tables can be included and should be clearly labelled.

A conclusion which briefly discusses the problem and; also includes the role of new
materials and technologies in the reduction of corrosion, or metal replacement.
- Role of new material and technologies to reduce corrosion: identified in the final
descriptor of the body [measures used to reduce the corrosion of iron]

A bibliography of the sources should follow the correct format and layout. See your
School Record Book for details. Please use in-text referencing for this task. Include
annotations for the 3 main references used.

A draft must be submitted by 10th August.
Submit
Word processed report as outlined above to your teacher and an
Electronic copy saved to online assignment centre (OAC).
11 Chemistry ERT1 Corrosion - Assessment Criteria:
Criteria
A
B
C
D
E
Research Process (Establishing, conducting, and managing)
Investigation
Process
1. Formulation of justified significant
questions/ hypothesis which inform
effective and efficient design, refinement
and management of investigation process
- Evidence of comprehensive questioning
used to focus research
- Reference to in excess of 6, reliable and
valid sources
Formulation of justified questions/
hypotheses which inform design and
management of investigations
Formulation of questions and
hypotheses to select and manage
investigations
Independent application of
given investigation process(s)
Guided use of given
process(s)
- Evidence of insightful questioning used to
focus research
- Reference to 4-6 reliable and valid sources
- Evidence of questioning used to
focus research
- Reference to 3 or more valid
resources
- Evidence of use of given
research questions
- Reference to some valid
resources
- Given research
questions used with
guidance
- Few references evident
Analysis of Findings (Discussion)
Investigation
Process
Knowledge
and
Conceptual
Understanding
3. Systematic analysis of primary and
secondary data to identify relationships
between patterns, trends and anomalies in
the corrosion process including:
- Data from multiple studied on corrosion
- Evidence of comprehensive reflection of
research findings with;
- Clear and specified links between concepts
1. Reproduction and interpretation of
complex and challenging concepts, theories
and principles of corrosion including:
- Corrosion definition and explanation in a
number of contexts
- Favourable and unfavourable conditions
- Examples of corrosion
2. Comparison and explanation of complex
concepts, processes, and phenomena of
corrosion
- Metal, environment and metalenvironment interface considered and
evaluated
- involves a consideration of a variety of
factors affecting corrosion
3. Linking and application of concepts,
principles, theories and schema of reduction
potentials to find solutions in complex and
challenging situations including:
- At least 4 classifications of corrosion
preventions including;
- example(s) that describe the processes
Analysis of primary and secondary data to
identify patterns, trends and anomalies of
corrosion processes including:
Analysis of primary and secondary
data to identify obvious patterns,
trends and anomalies including:
Identification of obvious
patterns in findings of
corrosion.
Simple recording of data
- Data from multiple studies on corrosion
- Evidence of insightful reflection of data
with;
- Specified links between concepts
Reproduction and interpretation of complex
and/or challenging concepts, theories and
principles of corrosion including:
- Corrosion definition and/ or explanation in
a number of contexts
- Reaction for oxidation of iron to rust
- Examples of corrosion
- Some data on studies of
corrosion
- Evidence of reflection of data
- Some links between concepts
Reproduction of concepts theories
and principles of corrosion
including:
- Corrosion definition and/or
explanation including;
- An example of corrosion
- Evidence of consultation of
studies on corrosion
- Little evidence of reflection
of research findings
Reproduction of obvious
patterns of corrosion
- No evidence of
consultation of studies
- No evidence of
reflection
Reproduction of isolated
facts
- Simple corrosion definition
or explanation
- Simple definition or
explanation of
corrosion
Comparison and explanation of concepts
processes and phenomena of corrosion
Explanation of simple processes
and phenomena or corrosion
Description of simple
processes and phenomena
Recognition of isolated
simple phenomena
- Metal, environment and metalenvironment interface considered and
evaluated
- Evaluates the main factors affecting
corrosion
Linking and application of concepts,
principles, theories, and schema of
reduction potentials to find solutions in
complex or challenging situations including:
- At least 3 classifications of corrosion
preventions including;
- example(s) and/or descriptions of the
processes
- Consider and evaluate the metalenvironment interface
- Describes the metalenvironment interface
- Considers the main factors
affecting corrosion
Application of principles, theories
and schema of reduction potentials
to find solutions in simple
situations including:
- description of corrosion
preventions including;
- example(s) or descriptions of the
processes
- Identifies main factor(s)
affecting corrosion
Application of principles,
theories and schema of
reduction potentials
- Identifies metalenvironment interface
or main factors
affecting corrosion
Application of simple
given algorithms of
reduction potentials
- describes a process of
corrosion prevention or;
- describes an example
- identifies a process of
corrosions or an
example
11 Chemistry ERT1 Corrosion - Assessment Criteria:
Evaluating and Concluding
Evaluating and
Concluding
1. Analysis and evaluation of complex
scientific interrelationships
Analysis of complex scientific
interrelationships with corrosion
Description of scientific
interrelationships with corrosion
Identification of simple
scientific interrelationships
with corrosion
Identification of scenarios or
possible outcomes for
preventing corrosion
- Identifies (a) cause(s) of
corrosion and;
- Identifies appropriate
response(s) to identified
cause(s)
Identification of obvious
scientific relationships
with corrosion
Statements about
outcomes for preventing
corrosion
- Identifies a cause of
corrosion and or:
- A response to a cause
of corrosion
2. Exploration of scenarios and possible
outcomes with justification of
conclusions/recommendations
- arrives at justified decisions of the main
causes of corrosion and the best, most
valid, contributing factors
- provides appropriate responses to the
main causes of corrosion contributing to
appropriate prevention measures
Explanation of scenarios and possible
outcomes with discussion of conclusions
for preventing corrosion
- Justifies the main causes of corrosion and
the contributing factors and;
- Provides corresponding responses to
identified causes, contributing to
appropriate prevention measures
Description of scenarios and possible
outcomes with statements of
conclusion for preventing corrosion
- Describes some causes of
corrosion and the contributing
factors
- Identifies corresponding responses
and prevention measures
3. Discriminating selection, use and
presentation of scientific data and ideas to
make meaning accessible to intended
audience through innovative use of a range
of formats
- Writing demonstrates outstanding and
extended knowledge of vocabulary and
scientific terminology
- Correct and relevant use of rules and
equations from lessons and extended
research
- No grammar, spelling or punctuation
errors
Selection, use and presentation of scientific
data and ideas to make meaning accessible
to intended audiences in a range of
formats
Selection, use and presentation of
scientific data and ideas to make
meaning accessible in a range of
formats
Presentation of scientific data
or ideas in a range of formats
Presentation of scientific
data or idea
- Writing demonstrates an in-depth
knowledge of vocabulary and scientific
terminology
- Correct use of rules and equations from
lessons and/or extended research
- Writing demonstrates a sound
knowledge of vocabulary and
scientific terminology
- Correct use of rules and/or
equations from lessons
- Writing demonstrates some
knowledge of correct
vocabulary with;
- Correct use of rules or
equations from lessons
- Writing is limited with
multiple errors
- Little to no grammar, spelling or
punctuation
- Few grammar, spelling and
punctuation errors
- Multiple errors in grammar
and spelling
Communication
Evaluating and
Concluding
- Use or incorrect use of
rules and equations
from lessons
- Multiple errors