Particulate Nature of Matter — Question 10

Grains of rice and rice flour are considered solids, despite appearing to take the shape of their container. This is because each grain retains its shape and volume, even when mixed. The “flowing” behavior is due to the ability of these small, irregularly shaped particles to move past each other with minimal friction. Class 8 Particulate Nature of Matter Question Answer (Activities) Activity 7.9: Let us find out (Page 110) 1. Light an incense stick in one corner of the room. 2. Wait for a few minutes and observe. 3. Do you notice the fragrance from a distance? Answer: Observations: We can smell the fragrance of an incense stick from one corner. Slowly, the fragrance of this incense stick can be smelled all around the room. Conclusions: The smell of an incense stick can be observed throughout the room because the particles of air are moving randomly. As the interparticle forces are weak, they can move freely around the room.