Year 5 Science

Chapters to explore

A life cycle describes stages in an organism’s life. Animals and plants reproduce in different ways. Many flowering plants reproduce sexually through flowers and seeds; some also reproduce asexually. Different animal groups have different developmental patterns.

Try it: Compare two life cycles and identify similarities and differences.

Humans develop from infancy through childhood, adolescence and adulthood. Growth and puberty vary in timing between people. Respectful discussion uses accurate words and protects privacy. Trusted adults and suitable health education resources help answer questions about growing and changing.

Try it: With an adult, identify reliable resources for age-appropriate growing-and-changing education.

Dissolving forms a solution; it is not the same as melting. Insoluble solids can often be separated from liquids by filtration. Dissolved solids can sometimes be recovered by evaporation. Material changes may be reversible or irreversible depending on what happens.

Try it: Plan how to separate a safe mixture using its components’ different properties.

Earth rotates on its axis and orbits the Sun. Rotation causes the cycle of day and night. The Moon orbits Earth and reflects sunlight. Models simplify sizes, distances and motions, so identify what is not shown to scale.

Try it: Use a ball and torch to model day and night. Explain the model’s limits.

Gravity pulls objects towards Earth. Air resistance and water resistance can oppose movement through these fluids. Friction acts between surfaces. Levers, pulleys and gears can change the size or direction of a force, but they do not create energy from nothing.

Try it: Design a safe low-height parachute comparison with adult supervision.

An independent variable is deliberately changed. A dependent variable is measured. Control variables are relevant conditions kept similar. Graphs help examine relationships. A conclusion should state the evidence and the limits of the investigation.

Try it: Write a test plan identifying all three kinds of variable.

A life cycle describes stages in an organism’s life and reproduction. Different groups have different patterns. A butterfly’s egg, larva, pupa and adult stages differ from a mammal’s development. Diagrams simplify variation within species and groups.

Try it: Compare two reliable life-cycle diagrams.

Some changes can be reversed under suitable conditions, such as melting and freezing water. Other changes form new substances and are not easily reversed, such as cooking an egg. Appearance alone may not identify the process. Adults must manage heat and unfamiliar substances.

Try it: Sort illustrated changes with an adult; do not heat materials independently.

A variable is a factor that can change. In a simple fair test, change the factor being investigated, measure an outcome and keep relevant other factors consistent. Repeats can reveal variability. A fair test is not the best method for every scientific question.

Try it: Design a safe comparison and identify its variables.

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.