Curriculum
Science — Third Preparatory
Science — Third Preparatory
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Unit 1 — Chemical Reactions and Their Environmental Impacts
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Question bank: Unit 1 — Chemical Reactions and Their Environmental Impacts
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Unit 2 — Electricity and Magnetism
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Question bank: Unit 2 — Electricity and Magnetism
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Unit 3 — Variation of Traits in Living Organisms
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Question bank: Unit 3 — Variation of Traits in Living Organisms
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Unit 4 — Dating Planet Earth
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- 1.1 How do we know that dinosaurs lived millions of years ago?
- 1.2 What is a fossil and how does it form?
- 1.3 Types of fossils
- 1.4 The fossil record
- 1.5 The importance of the fossil record
- 1.6 Causes of the diversity of life forms through time
- 1.7 Comparative anatomy
- 1.8 Summary of Lesson 1
- 2.1 How old is Earth?
- 2.2 The geologic time scale
- 2.3 Reading Earth's history from rocks and fossils
- 2.4 Determining the age of rocks
- 2.5 Relative age
- 2.6 Absolute age
- 2.7 Comparing relative and absolute dating
- 2.8 Exploiting resources and extinction (issue)
- 2.9 Summary of Lesson 2
- How a fossil forms, step by step
- How to read a rock column (relative dating)
- Choosing a dating method
- Half-life calculation recipe
- Common mistakes
- 📌 Comprehensive Scientific Terminology & Definitions:
- ⚖️ Governing Scientific Laws, Principles & Mathematical Formulas:
- 🔍 In-Depth Explanations, Deductions & Core Concepts:
- 📊 Common Radioactive Isotopes Used in Absolute Geological Dating:
- 💡 High-Yield Exam Traps & Key Takeaways:
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Question bank: Unit 4 — Dating Planet Earth
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Science — Third Preparatory 2026/2027
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Unit 1 - Force, Motion, Acceleration and Physical Quantities
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Text lesson
Unit 4 — Dating Planet Earth
Unit 4 — Dating Planet Earth
⚖️ Governing Scientific Laws, Principles & Mathematical Formulas:
⚖️ Governing Scientific Laws, Principles & Mathematical Formulas:
Key points
(‘Radioactive Decay Half-Life LawRemaining Parent Fraction = (1/2)^n, where n is the number of elapsed half-lives (n = Total Elapsed Time / Half-Life t1/2).’,)
(‘Principle of Cross-Cutting RelationshipsAn igneous intrusion or fault that cuts across other rock layers must be younger than the rocks it disrupts.’,)
(‘Principle of InclusionsAny rock fragment (xenolith or clast) enclosed within another rock layer must be older than the rock containing it.’,)
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