Current Unit: Matter, Compounds, and Mixtures (starting January 4, 2018) The 6th Grade All Star students next unit is on Matter. In this unit, 6th graders will identify the properties of solids, liquids, and gasses. Students will be finding the density of regular and irregular shaped objects. It addition, students will identify physical properties and chemical properties of matter. Students will also be conducting mini experiments on the physical and chemical properties of matter. Key topics for this unit include: Matter, Elements, Mixtures, Atoms, Molecules, Properties of matter, and States of matter.