The mass per unit volume of a substance is called density. (density = mass/volume). Arrange

Matter In Our Surrounding Class 9 | Class 9 Science Chapter 1 | Intex Questions | CBSE 2024-25 Playlist of Matter in our surrounding    • Matter in Our Surrounding   Watsapp Channel: https://whatsapp.com/channel/0029VaBk... PDF NOTES: https://telegram.me/edulover1 #matterinoursurroundingsclass9 #matterinoursurrounding #class9science #class9sciencechapter1 #class9th #class9science2024-25 1. The mass per unit volume of a substance is called density. (density = mass/volume). Arrange the following in order of increasing density – air, exhaust from chimneys, honey, water, chalk, cotton and iron. 2. (a) Tabulate the differences in the characterisitcs of states of matter. (b) Comment upon the following: rigidity, compressibility, fluidity, filling a gas container, shape, kinetic energy and density. 3. Give reasons (a) A gas fills completely the vessel in which it is kept. (b) A gas exerts pressure on the walls of the container. (c) A wooden table should be called a solid. (d) We can easily move our hand in air but to do the same through a solid block of wood we need a karate expert. 4. Liquids generally have lower density as compared to solids. But you must have observed that ice floats on water. Find out why.