Question 6: For any substance, why does the temperature remain constant during the change of state? 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. In contrast, learning activities are the learning experiences in which students participate for the purpose of acquiring these skills. Identify and describe three phases of matter: solid, liquid, and gas. Those elements that constitute our physical form and all living and non-living matter have existed since the earth was formed from the sun nearly 4.6 billion years ago. Concept about that liquids can flow (fluidity.) The heat required to change the state of matter without any change in temperature is called latent heat. Finally, the fourth objective is to enhance student’s inquiry skills. Now study topics like Matter in Our Surroundings from Class 9 Science with 1. MODULE - 2 Matter in Our Surroundings Matter in our Surroundings Notes 24 2.3.1 Solids We are surrounded by innumerable solid objects. The learning objectives of this chapter are characteristics of Matter, Effect of change in temperature and pressure on the states of matter, factors affecting evaporation and the effects of evaporation. Answers: The given substances in the increasing order of their densities can be represented as: Air
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