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Ch 28 C4.2 Transfers of energy and matter: complete notes
Neat, exam-ready notebook-style notes for Ch 28 C4.2 Transfers of energy and matter, following the IB Diploma syllabus, SL and HL. This chapter is part of the complete Biology Notes for IB Diploma Students (SL and HL): All 40 Topics.
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Free preview: Ch 28 C4.2 Transfers of energy and matter notes
A quick look at the chapter from our IB Diploma Biology notes. The full chapter notes have the detailed explanations, diagrams and practice questions with answers.
Topics in this chapter
- What you must be able to do
- Chains and webs
- Trophic levels
- Primary and secondary production
- Oxygen and carbon dioxide: a major interaction
- Recycling of all elements
“I can” checklist: what you must be able to do
- I can distinguish open and closed systems and construct food chains and webs with arrows in the correct direction.
- I can classify organisms as autotrophs or heterotrophs and assign trophic levels.
- I can draw and interpret energy pyramids and explain energy losses and the limit on trophic levels.
- I can define and calculate primary and secondary production.
- I can draw a carbon cycle, define sinks and sources and analyse the Keeling curve.
What is inside the full chapter notes
- Concept notes with 8 worked examples
- Energy-transfer and production calculations; Keeling curve
- Common mistakes; investigation (IA) ideas
- 15 Paper 1A-style MCQs, explained
- 3 structured questions with mark schemes (one is Paper 1B data-based)
- Quick-reference sheet and "I can" checklist
What you get in the pack
- All 40 topics of IB Diploma Biology for students taking Standard Level or Higher Level (first assessment 2025): water, nucleic acids, the origin of cells, cell structure, viruses, diversity and classification, evolution and speciation, conservation, carbohydrates, lipids and proteins, membranes, organelles, cell specialization, gas exchange, transport, muscle and motility, adaptation and niches, enzymes and metabolism, cell respiration, photosynthesis, chemical and neural signalling, integration of body systems, defence against disease, populations and communities, transfers of energy and matter, DNA replication, protein synthesis, mutation and gene editing, cell division, gene expression, water potential, reproduction, inheritance, homeostasis, natural selection, stability and change, climate change
- Every syllabus statement covered in order, each marked SL or HL, with clear notes, tables and diagrams drawn for these notes
- Worked examples in every topic: calculations and model answers that show how to earn the marks
- Original Paper 1A-style multiple-choice questions with explained answers, plus Paper 2-style structured and data-based questions with full mark schemes (no past-paper reprints)
- Common mistakes and investigation (internal assessment) ideas for every topic
- Quick-reference sheet and an "I can" checklist at the end of every topic
- Colour PDF and a black and white copy of every chapter for printing
- Independent notes for IB Diploma students; not endorsed by or affiliated with the International Baccalaureate Organization (IBO)
All chapters in this pack
- Ch 1 A1.1 Water
- Ch 2 A1.2 Nucleic acids
- Ch 3 A2.1 Origins of cells
- Ch 4 A2.2 Cell structure
- Ch 5 A2.3 Viruses
- Ch 6 A3.1 Diversity of organisms
- Ch 7 A3.2 Classification and cladistics
- Ch 8 A4.1 Evolution and speciation
- Ch 9 A4.2 Conservation of biodiversity
- Ch 10 B1.1 Carbohydrates and lipids
- Ch 11 B1.2 Proteins
- Ch 12 B2.1 Membranes and membrane transport
- Ch 13 B2.2 Organelles and compartmentalization
- Ch 14 B2.3 Cell specialization
- Ch 15 B3.1 Gas exchange
- Ch 16 B3.2 Transport
- Ch 17 B3.3 Muscle and motility
- Ch 18 B4.1 Adaptation to environment
- Ch 19 B4.2 Ecological niches
- Ch 20 C1.1 Enzymes and metabolism
- Ch 21 C1.2 Cell respiration
- Ch 22 C1.3 Photosynthesis
- Ch 23 C2.1 Chemical signalling
- Ch 24 C2.2 Neural signalling
- Ch 25 C3.1 Integration of body systems
- Ch 26 C3.2 Defence against disease
- Ch 27 C4.1 Populations and communities
- Ch 28 C4.2 Transfers of energy and matter
- Ch 29 D1.1 DNA replication
- Ch 30 D1.2 Protein synthesis
- Ch 31 D1.3 Mutation and gene editing
- Ch 32 D2.1 Cell and nuclear division
- Ch 33 D2.2 Gene expression
- Ch 34 D2.3 Water potential
- Ch 35 D3.1 Reproduction
- Ch 36 D3.2 Inheritance
- Ch 37 D3.3 Homeostasis
- Ch 38 D4.1 Natural selection
- Ch 39 D4.2 Stability and change
- Ch 40 D4.3 Climate change