Students looking for a straightforward approach to understand the complications of the subject can contact us at Aakash Institute. Here we have covered Important Questions on Matter In Our Surroundings for Class 9 Science subject.. Science Important Questions Class 9 are given below.. This is because all the heat supplied to increase the temperature is utilised in changing the state by overcoming the forces of attraction between the particles. Hence all of us are surrounded by matter. 3: (b) no definite volume no definite shape. Answers: The given substances in the increasing order of their densities can be represented as: Air