This learning resource aims to help students understand the concept of matter, defining it as anything that possesses mass and occupies space. Through a practical activity involving a sugar cube dissolving in water, students will explore the characteristics of visible and invisible substances. The resource encourages critical thinking by prompting students to analyze whether substances like a rock or dissolved sugar meet the criteria of having mass and taking up space, even when they are not visible. Additionally, students will be engaged with reflective questions about the nature of matter and will be tasked to create their own definition of the term, consolidating their understanding in a relatable way.