Model and experimental evidence
Modern physics uses models tested by spectra, scattering, decays, and detectors. Distinguish an observation from its interpretation.
IB Diploma DP1 / Physics / Curriculum
Theme B: Particulate nature of matter: structured theory, worked examples, answered practice, and a mastery checklist for IB Diploma DP1.
Unit
The essential chapter ideas in a clear sequence before practice.
Modern physics uses models tested by spectra, scattering, decays, and detectors. Distinguish an observation from its interpretation.
A single nuclear decay is random, but large samples follow predictable laws. Use half-life or an exponential relation with the correct scale.
In atomic and nuclear processes, check energy, momentum, charge, and particle numbers where applicable. Do not mix eV and J without conversion.
Physics
Follow the method step by step and check why every step is valid.
A sample starts with 640 active nuclei and 4 half-lives pass. How many are expected?
Physics
Link each topic to equations, units, data handling, and required practical thinking.
The structure follows the official textbook layout and is used to organise study.
The areas that usually create mistakes or need extra revision.
N = 40
Before calculating, explain the key idea from “Thermal energy transfers” and which conditions must be checked.
The answer should show not only which rule is used for “Thermal energy transfers”, but also why it is valid here.
Theme B: Particulate nature of matter
Try independently, use the hint if needed, then open the answer guide.
1. Explain the idea and give one correct foundation example for “Thermal energy transfers”.
Write known quantities in SI units, draw a diagram where useful, and state the law before substitution.
A complete answer links “Thermal energy transfers” to a physical law or model, correct units, and an interpretation.
2. Solve an application and show every intermediate step for “Temperature and internal energy”.
Write known quantities in SI units, draw a diagram where useful, and state the law before substitution.
A complete answer links “Temperature and internal energy” to a physical law or model, correct units, and an interpretation.
3. Compare a correct and an incorrect approach and justify the difference for “Gas laws”.
Write known quantities in SI units, draw a diagram where useful, and state the law before substitution.
A complete answer links “Gas laws” to a physical law or model, correct units, and an interpretation.
4. Create a short exam-style question and check your answer for “Thermodynamics in HL scope”.
Write known quantities in SI units, draw a diagram where useful, and state the law before substitution.
A complete answer links “Thermodynamics in HL scope” to a physical law or model, correct units, and an interpretation.
Where to start: textbook, daily material, PDFs, videos, and worked examples.
Targeted practice before full tests so coverage is clear.
How to measure progress in this chapter and when it enters a cumulative mock.
What to do after finishing the chapter and how it connects to the next unit.
Note: for the official examinable syllabus of each school year, always confirm with the school, tutor, and current Ministry/IEP announcements.