NCERT Solutions for Curiosity Chapter 7 Heat Transfer in Nature

About this chapter

Heat travels from a hotter place to a colder place in three ways — conduction , convection and radiation . Pema and Palden meet all three in one evening: the metal pan on the fire, the smoke rising from the burning wood, and the warmth they feel sitting around the fireplace. In conduction , heat passes from the hotter part of an object to its colder part. A heated particle passes heat on to its neighbour, and so on, but the particles themselves do not move from their positions . This is how heat travels in solids. Materials that let heat pass through them easily — metals such as aluminium, iron and steel — are good conductors of heat . Wood, glass, clay, porcelain, plastic and air are poor conductors (insulators) . Woollen clothes, two thin blankets and hollow bricks all work by trapping a

• –90Chapter opener
• .1 Conduction of Heat
• .1 Conduction of Heat / 7.2 Convection
• –937.2 Convection
• .2 Convection
• –947.2 Convection
• –957.2.1 Land and Sea Breeze
• .2.1 Land and Sea Breeze
• .3 Radiation
• .4 Water Cycle