GRADE VII SCIENCE CHAPTER: HEAT ( PART-II) Students, today we will discuss the following topics of the Chapter: Heat. Ø Flow of heat Ø Conduction Ø Conductors & Insulators Ø Convection Ø Sea breeze Ø Land breeze Ø Radiation You will be provided with a video link of YouTube that will help you to understand it better. Most of the topics of this chapter are explained in the written form, as follow: FLOW OF HEAT Students, do you know why the mercury in a thermometer rise when you place it under your tongue? This is because it gets heated and expands. The heat from your mouth flows to the glass bulb to the mercury. Heat can flow or travel through solids, liquids, gases and even through space. However it travels differently in different materials. There are three different ways in which heat travels: a) Conduction b) Convection c) Radiation CONDUC...
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