Heat transfer Eric Angat Teacher Convection: Radiation:

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Presentation transcript:

Heat transfer Eric Angat Teacher Convection: Radiation: Conduction:

Essential Question How does heat transfer affect weather?

Conduction happens fastest in metals. convection happens in fluids (liquids and gases). Hot fluids rise and cold fluids sinks Radiation is heat transfer by electromagnetic radiation. Radiation heat transfer can happen even in space. Radiation

Interactive Learning

1.What are the three types of heat transfer? 2.How is heat similar to seismic energy? Think! 3.How is heat transferred from the Sun to you? The Sun is 93 million miles of empty space away from us. Think! Radiation- heat travels in a vacuum.

Radiation:

1.What are the three types of heat transfer? 2.How is radiation heat transfer similar to seismic energy? Think! 3. How is heat transferred from the Sun to you? The Sun is 93 million miles of empty space away from us. Think! Radiation, convection, and conduction They are both waves. Because heat can travel in the form of electromagnetic wave.

convection convection – WARM AND MOIST air rises convection – COLD AND DRY air sinks

Warm: Carbon monoxide Cold air (nitrogen, oxygen, and other gases) Convection – heat transfer in gases.

4. What is bouyancy ? 5. What is convection? 6. Why is the furnace located in the basement and not in the attic? Think! 7.What happens to water and air when heated? 8. What are fluids? Convection – hot gases and liquids rise and cold gases and liquids sink.

Convection means hot gases and liquids rise and cold gases and liquids sink. Fluids refer to liquids and gases. Convection:

4. What is buoyancy ? 5. What is convection? 6. Why is the furnace located in the basement and not in the attic? Think! Buoyancy states that if an object is denser it sinks and when it is less dense it rises. Convection means hot gases and liquids rise and cold gases and liquids sink. Because of convection. If the furnace is in the attic then the basement will be freezing.

7.What happens to water and air when heated? 8. What are fluids? When water and air are heated they become Less dense and they rise. Fluids refer to liquids and gases.

9.Which is a better conductor metal or glass? 10.Why are metals considered as the best conductors? 11.What is conduction? Conduction is the transfer of heat by colliding particles.

Conduction is the transfer of heat by colliding particles. Metals have free electrons making them the best conductors. Conduction:

9.Which is a better conductor metal or glass? 10.Why are metals considered as the best conductors? 11.What is conduction? metal Because metals have free electrons. Conduction is the transfer of heat by colliding particles

___________12. This type of heat transfer causes tectonic plates to move. ___________13. boiling water. ___________14. evaporation. ___________15. Wind. ___________16. moves as a electromagnetic wave. ___________17. occurs with fluids. ___________18. handle of a pot getting hotter. ___________19. warm water and air rises from the equator. ___________20. cold water and wind sinks from Canada. A. Conduction B. convection C. radiation

___________12. This type of heat transfer causes tectonic plates to move. ___________13. boiling water. ___________14. evaporation. ___________15. Wind. ___________16. moves as a electromagnetic wave. ___________17. occurs with fluids. ___________18. handle of a cooking pot getting hotter. ___________19. warm water and air rises from the equator. ___________20. cold water and wind sinks from Canada. A. Conduction B. convection C. radiation? A. conduction B. convection C. radiation B. convection B. convection B. convection B. convection

B 21. Heat transfer in liquids and gases. C 22. Heat transfer without the need of a medium ( solid, liquid, gas). A 24. Flow of heat by physical contact. B 25. Heat transfer in fluids. C 26. Heat transfer through space. C 27. Sunlight travels 93 million miles to reach earth. B 28. Warm air mass from the Gulf of Mexico rises towards the East coast. B 29. Cold air mass from the North sinks towards the East coast. A 30. The engine of the car is very hot. A 31. In the beach, the sand becomes very hot during summer. B 32. Warm air has more water vapor than cold air.