GRADE -9* *Science activity-1* *Aim* – To distinguish between the three states of matter: Solid, liquids and gases *Material required* – Colored pens, ruler, pencil *Principle-* Due to the difference between the arrangement of particles, the three states of matter exist. *Conclusion*- The students were able to distinguish between solids, liquids and gases on the basis of various parameters such as shape, volume, compressibility, tendency to flow and molecular arrangement.