method of heat transfer ppt.............

heat

1. LET'S LEARN ABOUT HEAT

2. Define heat energy. Enumerate the different sources of heat. OBJECTIVES 1 2 3 Describe how heat flows in solid materials.

3. Heat is a form of energy that flows from a warmer material to a colder one. HEAT

4. Imagine a cup of hot chocolate on a table. If you put some ice cubes in the hot chocolate drink, what do you think will happen to the hot chocolate? What will happen to the ice cubes? PICTURE THIS!

5. The chocolate drink is hot while the ice cubes are cold. When mixed, the chocolate drink cools down and the ice cubes warm up and melt. Heat flows from the hot chocolate to the ice cubes.

6. If there is a difference in temperatures between two objects, heat flows. Temperature is a measurement of how hot or cold something is. TEMPERATURE

7. If you put a scoop of ice cream into a warm bowl, what will be the direction of the flow of heat? Question

8. Heat flows from an object with a higher temperature object to one with a lower temperature. Since the bowl is warmer than the ice cream, heat flows from the bowl to the ice cream.

9. Sources of heat are objects that produce heat. They can be natural or artificial. Natural sources of heat occur naturally. Artificial sources of heat are man-made and are not found naturally. SOURCES OF HEAT

10. NATURAL SOURCES OF HEAT volcano Sun hot spring

11. ARTIFICIAL SOURCES OF HEAT hand dryer oven hair dryer

12. The process that heat transmits from one part of object to another or from one object to another object contacting with it Heat can flow through a solid. Heat is conducted from the hot end of the solid to its cooler end. TYPES OF HEAT TRANSFER CONDUCTION

13. Thermal conductors are objects that allow heat to flow easily through them. Metals such as copper, gold, and aluminum are conductors. CONDUCTORS

14. EXAMPLES OF CONDUCTORS copper gold aluminum

15. Thermal insulators are objects that do not allow heat to flow easily through them. Fabric, wood, and foam are insulators. INSULATORS

16. EXAMPLES OF INSULATORS fabric wood foam

17. The transfer of heat from one place to another due to the movement of fluid. Heat can flow through a liquid and gas. TYPES OF HEAT TRANSFER CONVECTION

18. A process where heat waves are emitted that may be absorbed, reflected, or transmitted through a colder body without direct contact. Heat can flow through a gas. TYPES OF HEAT TRANSFER RADIATION

19. What is heat? How does heat flow in solids? What are the different sources of heat? CHECK FOR UNDERSTANDING