Year 4 Science

Chapters to explore

Classification organises organisms using observable features. A simple identification key asks successive questions. Habitats can change naturally or through human activity, affecting the organisms living there. A classification is a model, not a judgement of an organism’s importance.

Try it: Design a simple key for four leaves or drawings using observable features.

Digestion breaks food down so useful substances can be absorbed. Teeth begin mechanical breakdown. Food passes through the mouth, oesophagus, stomach and intestines. A food web connects several food chains, reflecting multiple feeding relationships.

Try it: Build a simple food web from reliable information and explain what its arrows mean.

Solids usually keep their shape and volume. Liquids keep volume but take the container’s shape. Gases spread through available space. Heating or cooling can cause changes of state. Evaporation and condensation move water between liquid and gas in the water cycle.

Try it: Observe condensation on a cold container with an adult and describe where the water came from.

A vibrating source makes nearby material vibrate. These vibrations can travel through a medium to the ear. Pitch describes how high or low a sound is; loudness is different. Sound cannot travel through a vacuum because there is no material to carry it.

Try it: Use a safe simple instrument to compare high and low sounds without making loud noise.

A simple circuit needs a source, such as a cell, and a complete conducting path. A switch can open or close that path. Conductors allow charge to move readily; insulators resist it. Use only suitable low-voltage educational equipment with adult supervision.

Try it: Draw a complete low-voltage lamp circuit and explain what the switch does.

Tables keep observations organised. Repeating measurements helps reveal variation. A pattern can suggest a relationship, but does not automatically explain its cause. Choose a chart that matches the data and label the measured quantities and units.

Try it: Repeat a safe measurement and explain the variation in the results.

Digestion breaks food into substances the body can absorb. Teeth mechanically break food into smaller pieces. Different organs have different roles, and the process is more than chewing alone. Use diagrams respectfully and discuss health questions with an adult.

Try it: Label a reliable simplified digestive-system diagram.

Evaporation changes liquid water to water vapour at the surface. Condensation changes water vapour into liquid droplets when conditions allow. Water does not vanish from existence when it evaporates. Adults should handle hot water demonstrations.

Try it: Observe a safe cold-glass example with an adult.

A simple electrical circuit needs a complete conducting path. Some materials conduct electricity more readily than others. A switch opens or closes the path. Use only adult-approved low-voltage classroom equipment, never mains sockets or unknown electrical items.

Try it: Draw an open and closed circuit; practical work requires adult supervision.

Learning together

Each chapter brings together teaching, an example, practice and a practical discovery. Use the material with discussion and suitable offline activities. Choose a comfortable starting point and revisit explanations as needed.