Primary school science is often less visible to parents than maths or English. There is no SATs paper for science (it is assessed by teacher judgement), and parents sometimes assume it is all volcanoes and magnets. In reality, the KS2 science curriculum is broad, rigorous, and covers a surprising amount of ground across Years 3 to 6.
The Science Disciplines in KS2
The national curriculum organises KS2 science into distinct topic areas, spread across the four year groups. Not every topic appears in every year – instead, they are sequenced so that children build knowledge progressively. Here is an overview of what is covered:
- Plants (Year 3): Functions of different parts of flowering plants, requirements for life and growth, water transport, and the role of flowers in the life cycle including pollination, seed formation, and seed dispersal.
- Animals Including Humans (Years 3, 4, 6): Nutrition, skeletons and muscles (Y3), the digestive system and teeth (Y4), and the circulatory system and the impact of diet, exercise, and drugs (Y6).
- Rocks (Year 3): Types of rocks, how fossils are formed, and how soil is made from rocks and organic matter.
- Light (Years 3, 6): How light travels, shadows, reflection, and how we see (light entering the eye).
- Forces and Magnets (Years 3, 5): Magnetic forces and materials (Y3), gravity, air resistance, water resistance, friction, and mechanisms like levers, pulleys, and gears (Y5).
- Electricity (Years 4, 6): Simple circuits, switches, conductors and insulators (Y4), circuit diagrams and the effect of voltage on components (Y6).
- Living Things and Their Habitats (Years 4, 5, 6): Classification keys (Y4), life cycles and reproduction in plants and animals (Y5), and formal classification systems (Y6).
- Earth and Space (Year 5): The solar system, the movement of the Earth relative to the Sun, the Moon's orbit, and why we have day and night.
- Evolution and Inheritance (Year 6): How living things have changed over time, fossils as evidence, how offspring vary and are adapted to their environments.
Working Scientifically
Running through every science topic is a strand called "working scientifically". This covers the practical and investigative skills that children develop alongside their subject knowledge. In KS2, this includes asking scientific questions, setting up simple practical enquiries and comparative tests, making systematic observations, taking accurate measurements, recording data in tables and charts, and reporting findings.
By Year 5 and Year 6, children should be able to plan different types of scientific enquiry, control variables in fair tests, use scientific evidence to support or refute ideas, and identify causal relationships. These skills are arguably more important than the factual content – they teach children how to think like scientists.
Science is not just about knowing facts. It is about learning to ask good questions, design fair tests, and draw conclusions from evidence. The curriculum recognises this by making "working scientifically" a core strand in every year group.
Common Practical Investigations
Some of the most common practical activities in KS2 science include growing plants under different conditions and measuring the results, testing which materials are magnetic, building and testing electrical circuits, investigating how shadows change throughout the day, measuring forces with Newton metres, and comparing the properties of different types of rock. These hands-on investigations make abstract concepts concrete and give children real experience of the scientific method.
How Bell.Study Supports Science Learning
Two games on Bell.Study are directly relevant to the KS2 science curriculum. Science Quiz covers knowledge across all the KS2 science topics, with questions mapped to specific year group expectations. It is a useful revision tool for consolidating factual knowledge after topics have been taught in school.
Circuit Rescue focuses specifically on the electricity topic, letting children build and debug circuits in a game format. This reinforces the practical understanding of circuits, switches, conductors, and insulators that the curriculum requires in Years 4 and 6.
For a complete view of every science curriculum objective by year group, visit the Curriculum Browser. You can filter by subject and year group to see exactly what your child should be learning at each stage.