Physical Sciences MasterClass DBE

This MasterClass covers lessons for Physical Sciences Paper 1 (Physics) and Paper 2 (Chemistry) for the Grade 12 DBE examinations.

Created by Redhill School
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Physical Sciences MasterClass DBE
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  • 10:38:52 hours on-demand videos
  • 44 Lessons
  • Access until 31 December 2024
  • Access on mobile and PC devices

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Full DBE MasterClass Bundle
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  • All 8 DBE Subjects
  • Access until 31 December 2024
  • Access on mobile and PC devices
What will I learn?
  • Discussion of common mistakes and pitfalls in the questions relating to Newton’s Laws of Motion.
  • Understanding and application of the concepts relating to Momentum and Impulse.
  • Application and examples relating to the Work-Energy Theorem.
  • Discussion and application of the law of the conservation of energy.
  • Application of the concept relating to power and energy transfer.
  • Discussion of the common mistakes and pitfalls in the section of Gravitational and Electric Fields.
  • In-depth discussion of the concepts relating to Electric Circuits with specific focus on conceptual understanding of the principles.
  • In-depth discussion of the section on Photons and Electrons with specific focus on the application of analytical skills and the understanding of graphs.
  • Discussion of common mistakes and pitfalls in the Quantitative Chemistry section with specific focus on higher-level calculations.
  • In-depth discussion of chemical bonding to clarify uncertainties in this section.
  • In-depth discussion of the concept of Chemical Equilibrium with focus on the application of Le Châtelier’s principle, understanding of equilibrium graphs and equilibrium constant calculations.
  • In-depth coverage of Acids and Bases with specific focus on questions that students find challenging.
  • In-depth coverage of Organic Chemistry with specific focus on the in-depth discussion of concepts that students struggle with.
  • Discussion of what pH is and how it can be calculated.
  • Determining rms voltage and current.
  • Discussion of the uses and functioning of direct current generators.
  • An explanation of the Doppler Effect and how it can be used in calculations.
  • In-depth discussion of the fertiliser industry.
  • Discussion of the basics of 1D vertical projectile motion and presentation of a method to solve problems relating to vertical projectile motion.

Curriculum for this subject
44 Lessons 10:38:52 hours
21 Lessons 04:50:09 hours
  • Physical Sciences Sample Video
  • Vertical Projectile Motion
  • Newton’s Laws of Motion
  • Momentum and Impulse
  • The Work-Energy Theorem
  • Conservation of Energy
  • Power
  • Doppler Effect
  • Gravitational and Electric fields - Common mistakes and pitfalls
  • Ohm’s Law
  • Power and Energy - Electric Circuits
  • Internal Resistance
  • Direct current motors
  • Electromagnetic induction
  • Alternating current generators
  • Direct current generators
  • Alternating current
  • Calculations with Alternating Current
  • Introduction to the Photoelectric Effect
  • Photoelectric Effect Calculations
  • Photoelectric Effect graphs
  • Emission and Absorption spectra
  • Quantitative chemistry
  • Intramolecular bonds
  • Origin of intermolecular forces
  • Intermolecular forces and physical properties
  • Organic Chemistry - common mistakes and pitfalls.
  • Energy changes in reactions
  • Measuring and calculating rate
  • Factors affecting rate
  • Le Chȃtelier’s Principle
  • Equilibrium graphs
  • Industrial Processes
  • Equilibrium constant calculations
  • Ionisation, dissociation and strength of acids and bases
  • Conjugate acid-base pairs and amphoteric substances
  • Auto-ionisation of water Kw and pH
  • pH Calculations
  • Acid-base reactions and hydrolysis
  • Titrations
  • Redox reactions and the standard electrode potentials table
  • Galvanic cells
  • Electrolytic cells
  • The Fertiliser Industry
  • Caclulator
  • Pen
  • Coloured pens
  • Exam pad
  • Examination Guidelines document


The Physical Science MasterClass series of videos were produced to highlight, clarify and refine the most important concepts as described in the Examination Guidelines document.

An effort was made to address each of the concepts referred to in the Examination Guidelines document for both Physics and Chemistry. This was done by discussing common mistakes and pitfalls for topics with which students will be more familiar by now, as these were covered as part of the Grade 11 year. Other topics are discussed in depth and focus is placed on revising and clarifying concepts with which students traditionally encounter difficulties or are lacking in experience / practice.

In each of the videos in the Series, exam-style questions or questions adapted from past papers are discussed with the aim of providing the student with a blueprint to answer these questions. Special care was taken when discussing multi-calculation, multiple choice questions and explanation questions to explain how the student can get to the answer in depth.

Students are encouraged to attempt the questions themselves before watching the explanation. A student that watches this MasterClass Series attentively and who takes an active learning approach to the explanations given, by working through other past paper questions will be thoroughly prepared for the examinations.

Teacher Biography

Leon Roets has experienced and practised Science education throughout his life. After completing his M.Eng in Chemical Engineering in 2014, at North-West University, Leon opted to follow in his mother's footsteps - herself with a 35-year track record in Science education and still active - he has remained in the profession ever since. Leon has taught at both top state and private schools, and he is familiar with both examination boards. Unsurprisingly, several of his past students boast some of the best  Science achievements in the country. Currently, Leon serves as Sub Examiner for the IEB Chemistry Paper, whilst he is also the examiner of the Chemistry IEBt; in addition, he has collaborated on a Physical Sciences textbook for Grades 11 and 12.

Susan Wilson completed her Bachelor of Computational Physics, and her Honours Degree in Physics at the University of Kwa-Zulu Natal. She then entered the NASSP (National Astrophysics and Space Science Programme) at UCT, before completing her MSc in Space Science at North-West University. Finally, she completed her Doctorate in astrophysics at the University of Kwa-Zulu Natal; her thesis explored how the relationships between various properties of galaxy clusters have evolved over time. During her studies, she also assisted with tutoring younger students and worked as an assistant during first-year Physics practicals. 

After completing her PhD, Susan realised her passion lay more with teaching and education; she, therefore, completed her PGCE (Postgraduate Certificate in Education) through UNISA. She pursued a teaching job at Epworth High School in Kwa-Zulu Natal, where she taught Physical Sciences, Natural Sciences, Mathematics and Applied Mathematics. In 2021, she made the move to Redhill and began teaching Physics for the International Baccalaureate program as well as IEB Physical Sciences.

Lee-At Santo is a qualified Chemical Engineer with a Masters’ Degree in Chemical Engineering. She worked as an engineer for eight years, predominantly in the mining industry - for companies such as Fluor and Deloitte - designing  and optimising chemical plants. Her passion has always been the Sciences and the ability to impart knowledge. She worked as a Physical Science teacher at Crawford College, Benmore for three years and fell in love with teaching. Lee-At teaches Physical Sciences at Redhill which has been such an incredible experience so far. 
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