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The Nature of Heat

The Nature of Heat. Guiding Questions #5-9. Reflect Back…. One of the stations during the rotation lab on types of heat transfer involved melting ice. Look back at your observations from that station and reflect on the following in your notebook –

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The Nature of Heat

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  1. The Nature of Heat Guiding Questions #5-9

  2. Reflect Back…. One of the stations during the rotation lab on types of heat transfer involved melting ice. Look back at your observations from that station and reflect on the following in your notebook – • Describe what happened to the ice. Explain why you think this occurred. • Describe how your hand felt during this activity. Explain why this happened.

  3. What is Heat? HEAT is energy transferred between objects that are at different temperatures.

  4. In the activity, the heat moves from your hand, which is warmer, to the ice, which is cooler. • Heat energy MOVES from WARMER objects to COOLER objects. COOLER WARMER

  5. Check for Understanding For each of the examples listed below, identify the direction heat is transferred between the objects. Be able to explain your answer! • You are holding a mug of hot chocolate in your hands. • You accidently touch a hot pan in the oven and burn your finger. • You go outside in the cold without gloves, a hat or jacket on.

  6. How does Heat Affect Substances in terms of temperature and thermal energy? • When heat flows(moves) into a substance/object, the thermal energy of the substance increases. • When the thermal energy increases, then the temperature of the substance/object increases. • At the same time, the temperature of the substance/object that the heat moves from decreases.

  7. Does Heat Transfer Ever Stop? Heat flows from one substance/object to another until the two substances/objects have the same temperature. This is called thermal equilibrium. Heat transfer stops.

  8. Make a Prediction…. Two beakers are left sitting on the counter over night. Both beakers have 200 ml of water in them. Beaker A has hot water in it. Beaker B has cold water in it. The room temperature is 74 F. • Both beakers will be at approximately 74F the next day. • Heat will move from Beaker A, which is hotter, to the room, which is cooler. • Heat will move from the room, which is warmer, to Beaker B, which is cooler. • Heat transfer will continue until thermal equilibrium is reached (all the same temperature)

  9. Room Temperature 74F 200 ml hot water 200 ml cold water *Heat will move from beaker A to *Heat will move from room to air until water is at 74 F Beaker B until water is at 74F BEAKER A BEAKER B

  10. I can use this information in my daily life...

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