One page per syllabus section. Each teaches the Core content, diagrams it, then tests it with self-marked exam questions.
Characteristics and Classification of Living Organisms
Biology begins by deciding what counts as alive and how organisms should be grouped. It covers the seven characteristics of living organisms, the species definition and t...
9 questions · 26 marks
Revise this topicOrganisation of the Organism
The cell is the basic unit of every living organism, and this topic is about what is inside it. You need the structures of plant, animal and bacterial cells, the function...
9 questions · 27 marks
Revise this topicMovement Into and Out of Cells
Diffusion, osmosis and active transport are the three ways substances cross a cell membrane. Cambridge tests the direction of movement, the energy involved and the effect...
8 questions · 25 marks
Revise this topicBiological Molecules
Biological molecules are the large molecules built from smaller ones: carbohydrates from glucose, proteins from amino acids, and fats and oils from fatty acids and glycer...
8 questions · 25 marks
Revise this topicEnzymes
Enzymes are proteins that act as biological catalysts, speeding up the reactions that keep an organism alive. This topic covers the lock-and-key model, the specificity of...
9 questions · 29 marks
Revise this topicPlant Nutrition
Photosynthesis is how plants make their own food: they use light energy, trapped by chlorophyll, to turn carbon dioxide and water into glucose and oxygen. Cambridge wants...
9 questions · 26 marks
Revise this topicHuman Nutrition
Nutrition is about getting the right nutrients in the right amounts, then breaking them down so the body can absorb and use them. This topic covers a balanced diet and th...
9 questions · 29 marks
Revise this topicTransport in Plants
Plants have no pump, yet water reaches the top of the tallest tree. This page covers the xylem and phloem, how water is taken up by the roots and pulled up the plant, tra...
9 questions · 29 marks
Revise this topicTransport in Animals
Every cell needs oxygen and food delivered and waste removed, and in large animals diffusion alone is far too slow. This topic covers how the body solves that problem: th...
9 questions · 29 marks
Revise this topicDiseases and Immunity
A pathogen is a disease-causing organism, and a transmissible disease can be passed from one host to another. This topic covers the four types of pathogen and how they sp...
9 questions · 27 marks
Revise this topicGas Exchange in Humans
Gas exchange is where oxygen diffuses from the air into the blood and carbon dioxide diffuses out, in the alveoli of the lungs. You need the features of an efficient gas ...
8 questions · 25 marks
Revise this topicRespiration
Respiration is the chemical release of energy from nutrient molecules inside cells - not the same thing as breathing. You need the word and balanced equations for aerobic...
8 questions · 24 marks
Revise this topicCoordination and Response
Coordination and response covers how the body detects stimuli and reacts to them. You need the nervous system and the reflex arc, the synapse, the structure and working o...
9 questions · 28 marks
Revise this topicDrugs
A drug is any substance taken into the body that modifies or affects chemical reactions in the body. This topic covers antibiotics and why they kill bacteria but not viru...
9 questions · 26 marks
Revise this topicReproduction
Reproduction passes genes on to the next generation. Asexual reproduction makes genetically identical offspring from one parent, while sexual reproduction fuses two gamet...
8 questions · 25 marks
Revise this topicInheritance
Inheritance is how genetic information passes from generation to generation. Genes are lengths of DNA that code for proteins, and different alleles of a gene produce diff...
8 questions · 25 marks
Revise this topicVariation and Selection
Variation is what makes every individual of a species slightly different, and it is the raw material of natural selection. This topic covers continuous and discontinuous ...
8 questions · 23 marks
Revise this topicOrganisms and Their Environment
Organisms do not live alone: they share a habitat, feed on one another and recycle carbon through the air, the soil and their own bodies. This topic covers energy flow fr...
9 questions · 29 marks
Revise this topicHuman Influences on Ecosystems
Human beings have increased food production with machinery, fertilisers, pesticides, herbicides and selective breeding - but the same methods pollute water and air, and c...
9 questions · 27 marks
Revise this topicWhere this fits in IGCSE Co-ordinated Sciences
This page is one area of Cambridge IGCSE Co-ordinated Sciences 0654 / 0973. IGCSE Co-ordinated Sciences is the course home: every area and every topic in Cambridge's own order, the papers you sit and what each one tests, and the exam-practice tools. The full topic list, with each topic linked to its revision page, is on the IGCSE Co-ordinated Sciences syllabus page.