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Summary Physics and Chemistry SAGS document
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All you need to know definitions, topics and calculations for both physics and chemistry tests and exams.
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29/129. PHYSICAL SCIENCES
(Updated January 2021)
A. MEANS OF ASSESSMENT
Paper 1 3 hours 200 marks (scaled to 150 marks)
Paper 2 3 hours 200 marks (scaled to 150 marks)
School-Based Assessment (SBA) 100 marks
400 marks
B. REQUIREMENTS
1. Examination
• Assessment tasks and questions will be based on the Subject
Assessment Syllabus as outlined in Section E of this document.
• There will be two examination papers that will be written on different days
• A variety of questioning styles will be employed in the final examination
with a maximum of 10% of the marks being in the multiple-choice format.
WEIGHTING OF KNOWLEDGE AREAS
Table 1 – Physical Sciences Paper I (Physics)
Approximate Marks Approximate %
Content Areas
(± 10 marks) (± 5%)
Kinematics (Motion in 1D) 50 25
Newton's Laws and
30 15
Applications of Newton's Laws
Momentum, Impulse, Work,
30 15
Energy and Power
Gravitational and Electric Fields 20 10
Electric Circuits 30 15
Electrodynamics 24 12
Photons and Electrons 16 8
Table 2 – Physical Sciences Paper II (Chemistry)
Approximate Marks Approximate %
Content Areas
(± 10 marks) (± 5%)
Quantitative Chemistry 30 15
Chemical Bonding 20 10
Energy Change & Rates of
20 10
Reactions
Chemical Equilibrium 25 12,5
Acids and Bases 25 12,5
Electrochemistry 40 20
Organic 40 20
IEB Copyright © 2014–2021 NATIONAL SENIOR CERTIFICATE HANDBOOK
IMPLEMENTATION DATE: GRADE 12, 2021
, 29/2
Table 3.1 – Weighting of Examination according to Taxonomy of
Cognitive Levels
Paper I Paper II
Level Description
Physics (%) Chemistry (%)
1 Knowledge and Recall 15 15
2 Comprehensions and
35 40
Routine Exercises
3 Application and Analysis 40 35
4 Synthesis and Evaluation 10 10
Information Pamphlet (Data Sheet)
Included with each of the Question Papers is a booklet containing the
following information: Formulae and Equations, Physical Constants,
Standard Electrode Potentials and Half-Reactions & the Periodic Table of
Elements including electronegativity values.
N.B. Formulae and equations could be included for two reasons:
(a) To be used in the numerical calculation of physical quantities.
(b) To illustrate, in symbolic form, a scientific law or principle that should
be known and applied verbally in the answer to a question.
IEB Copyright © 2014–2021 NATIONAL SENIOR CERTIFICATE HANDBOOK
IMPLEMENTATION DATE: GRADE 12, 2021
, 29/3
Table 3.2 – Physical Sciences Assessment Taxonomy
COGNITIVE
DOMAIN
LEVEL
EXAMPLE IN PHYSICAL
EXPLANATION DISCUSSION
SCIENCES
A question that requires a Given a labelled diagram of This question requires
learner to synthesise a car and a truck travelling learners to analyse the
their knowledge of a towards one another at the diagram and evaluate the
range of concepts, and same speed; the truck has given scenario and to
to use this to evaluate twice the mass of the car. synthesise their
some scenario would be Question: On impact the car knowledge of force,
classified as an exerts a force of magnitude momentum, acceleration
evaluation/synthesis F on the truck and and velocity.
question. experiences an acceleration
of magnitude a. Both drivers
are wearing identical seat
belts. Which driver is likely
to be more severely injured
on impact? Explain the
answer by referring to
acceleration and velocity.
When given a rate vs time This question requires
graph showing forward and learners to analyse the
reverse reactions for the graph and to synthesise
SYNTHESIS & EVALUATION
ionisation of an acid, their knowledge of
determine the effect of a reaction rates, chemical
change shown on the graph equilibrium, acids and
on the pH of the solution. bases and the relationship
between pH and [H3O+].
A multi-step calculation These calculations require
4
without any scaffolding: learners to evaluate and
Physics: A calculation analyse the given
requiring learners to set up information and to
simultaneous equations to synthesise their
calculate two unknown knowledge in order to
quantities. determine how to solve the
Chemistry: A Kc problem problem.
where the value of Kc is
given and the initial number
of moles of a reactant must
be calculated.
Explanations involving These explanations require
analysis of a diagram, graph learners to evaluate and
or text and applying analyse the given
knowledge in a new context: information and to
Physics: Explaining how a synthesise their
microphone works. knowledge in order to
(IEB Nov 2015) determine how to solve the
Chemistry: Explaining why problem.
aluminium cannot be
produced at the cathode
from the electrolysis of an
aqueous solution of Aℓ3+
ions.
(IEB Nov 2016)
IEB Copyright © 2014–2021 NATIONAL SENIOR CERTIFICATE HANDBOOK
IMPLEMENTATION DATE: GRADE 12, 2021
, 29/4
A question that requires When given a circuit diagram Although this question
a learner to analyse and determine the effect on the involves some level of
interpret a given reading on the voltmeter recall, and also some
situation, in the form of a across the cells (with internal comprehension of the
description or a resistance) if a change is concepts involved, the
diagram, would be made to the external circuit. cognitive process involved
classified as an analysis/ in analysing the situation is
application question. a higher-order skill.
A question that requires Given a labelled diagram of a The cognitive process
a learner to apply their galvanic cell (metals given but involved in application of
knowledge in a given polarity and anode/cathode their knowledge to the
APPLICATION & ANALYSIS
scenario would be NOT labelled), determine the scenario is a higher-order
classified as an analysis/ emf of the cell under standard skill.
application question. conditions.
A question that requires When given the structural The cognitive process
a learner to analyse a formula of an ester write down involved in analysis and in
given scenario, the IUPAC name. application of their
3
diagram or structure, knowledge to the given
and to apply their scenario is a higher-order
knowledge would be skill.
classified as an analysis/
application question.
Two- or three-step A "pendulum" type collision The cognitive process
calculations (routine). involving conservation of involved in analysis and in
momentum and mechanical application of their
energy to find maximum knowledge to the given
height. scenario is a higher-order
skill.
Explanations of physical Explain why butane has a Need to apply knowledge
properties. higher boiling point than of the factors influencing
methyl propane. the strength of
intermolecular forces to
boiling points.
A question that requires Explain why the reaction rate The cognitive process
a learner to explain the between zinc and HCℓ involved in providing the
reason behind some increases when the explanation is a higher-
observation or concentration of acid order skill, and thus the
phenomenon would be increases. question would be
classified as a categorised as a
comprehension question. comprehension question.
A question that requires State how the speed of The cognitive process
a learner to demonstrate photoelectrons emitted involved in understanding
their understanding of changes when the frequency the relationships between
scientific concepts and of the incident radiation is the concepts is a higher-
COMPREHENSION
the relationship increased. order skill.
between them is a
comprehension question.
A question that requires When given information about Learners need to
2
a learner to demonstrate a scientific investigation … understand/comprehend
their understanding of - Identify the independent and the scientific method, and
the scientific method is dependent variables to identify variables, trends
a comprehension - Draw a conclusion and relationships.
question. - Read a value off a graph
One-step calculations. Calculate the current if the Learners need to select
voltage is 2 V and the appropriate formulae and
resistance is 4 Ω. half-reactions from their
Writing (routine) Use the SEP table to write a data sheets and need to
chemical equations. half-equation for the anode understand how to use
reaction. them correctly.
Write a balanced chemical
equation for the ionisation of
HCℓ.
IEB Copyright © 2014–2021 NATIONAL SENIOR CERTIFICATE HANDBOOK
IMPLEMENTATION DATE: GRADE 12, 2021
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