Heat and States of Matter
Discover how thermal energy is transferred within different states of matter, unlocking the mysteries of heat exchange and transformations. Explore the fascinating world of energy transfer and understand its significance in various materials and environments.
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Presentation Transcript
Chapter 9 Chapter 9 Heat and States of Matter Heat and States of Matter Section 3 Transferring Thermal Energy 1
Prior Knowledge Prior Knowledge Have you ever burned yourself on by touching a hot object? What type of material was the object made of? There are several ways to cook popcorn list the ones you know here:
Ways to Transfer Thermal Energy Ways to Transfer Thermal Energy Thermal energy can be transferred from one place to another (warmer to cooler always) by conduction, convection or radiation.
Ways to Transfer Thermal Energy Ways to Transfer Thermal Energy Conduction A transfer of thermal energy when particles collide (touching).
Ways to Transfer Thermal Energy Ways to Transfer Thermal Energy Convection A transfer of thermal energy in a fluid by the movement of fluid from place to place. (Fluids flow gases are fluids too!) Convection currents circulation of fluids due to a difference in densities warm fluids are lighter, cooler fluids are more dense. This causes a circulation of the fluids to rise and fall.
Ways to Transfer Thermal Energy Ways to Transfer Thermal Energy Radiation The transfer of thermal energy by electromagnetic waves through a space where no matter is present.
Which type of heat transfer? Which type of heat transfer? 1. Sitting by a warm fire ________________ 2. A room warmed by a radiator ________________ 3. A spoon sitting in a cup of hot coffee ________________ 4. A heating lamp ________________ 5. Ironing a shirt ________________ 6. Frying a piece of fish ________________
Thermal Insulators Thermal Insulators Thermal Insulators - Materials in which thermal energy moves slowly; fiberglass, plastics, air are good insulators Conductors Materials in which thermal energy moves quickly these are poor insulators; metals.
