Sample paper of Chapter- IS Matter around us pure https://drive.google.com/file/d/1LT9d4-S211EmTtNcKdGEUqBejodMBkM-/view?usp=drivesdk
Chapter- Matter in our surrounding video Link - https://dai.ly/x7oxw7v
YouTube Channel Link - https://www.youtube.com/channel/UCjClczBJBKgpOSlGzx813gA