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You learn to tell solids, liquids and gases apart by their shape and how they move. This helps you explain everyday changes like melting, evaporation and freezing.
You should already know common materials such as water, ice and air. It also helps to understand the ideas of heating and cooling.
One question from this skill's own question bank, shown with its full working.
Which state of matter has a fixed shape?
Working: Solids keep a fixed shape and volume.
This topic normally appears in Upper Primary work on matter and its changes, often in Basic 4 to Basic 6 science lessons. It supports school-based assessment and lays a foundation for BECE-style questions on everyday science.
Curriculum notes are a general guide to where this work normally sits. Always check the syllabus your school or examination body is currently using.
Other Upper Primary Matter & Energy skills in Science, at the same point in the course.
6 questions with a worked answer after every attempt, and a SmartScore that tracks how close you are to mastery.