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HEAT.pptx
- 1. HEAT
- 2. What are the three methods of transferring energy? (conduction, convection and radiation)
- 3. HEAT Heat is the total energy of molecular motion in a substance while temperature is a measure of the average energy of molecular motion in a substance. If heat is absorbed or given off by an object, its temperature changes. If the object absorbs heat its temperature rises while if the object gives off heat its temperature decreases.
- 4. HEAT Remember that heat is the transfer of energy between objects or places because of difference in temperature. Heat exists as energy in transit and it is not contained in an object. The energy that is actually contained in an object due to the motion of its particles is called thermal energy.
- 5. HEAT The thermal energy of an object is changed if heat is transferred to or from it. Since the amount of heat transferred relates to the amount of change in thermal energy, the term heat in this module is also used to refer to the measure of thermal energy transferred.
- 6. HEAT Heat is transfer of (thermal) energy between objects or places due to temperature differences. Heat transfers from an object of higher temperature to an object of lower temperature.
- 7. HEAT Heat can be transferred through conduction, convection, or radiation, and that heat transfers either through moving particles or electromagnetic waves. Some factors that affect heat transfer, like the conductivity of the materials.
- 8. MISCONCEPTIONS 1. Heat is a substance. 2. Heat is not energy. 3. Heat and temperature are one and the same. 4. The temperature of an object depends on its size or volume. 5. The amount of heat transferred is determined always by the change in temperature.
- 9. In a bakery, when do cookies cook faster, is it at lower temperature or at higher temperature? Explain your answer.
- 10. 1.What happens when I blow hot air on the balloon? Why? 2. What is happening to the air inside the balloon? 3. What do you think would happen if the balloon was placed in a cold car? 4. What would happen to the balloon as the temperature increases in the car? Why? 5.What might happen to a balloon in a bottle when it is heated.
- 11. If heat is added to an object, the particles of the object gain kinetic energy and they move faster. Since temperature is directly related to kinetic energy, any gain in kinetic energy would cause the temperature to increase. Conversely, if heat is transferred or removed from an object, it loses kinetic energy, its particles move slower and the bodys temperature decreases.