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Heat Transfer

Heat Transfer. Reference. You know that energy from the sun is absorbed by Earth’s surfaces. Some energy is then transferred from the surface to the atmosphere in the form of heat. The heat then moves from place to place within the atmosphere. BUT HOW DOES HEAT MOVE IN THE ATMOSPHERE?!.

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Heat Transfer

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  1. Heat Transfer Reference

  2. You know that energy from the sun is absorbed by Earth’s surfaces. Some energy is then transferred from the surface to the atmosphere in the form of heat. The heat then moves from place to place within the atmosphere. BUT HOW DOES HEAT MOVE IN THE ATMOSPHERE?!

  3. How Heat is Transferred The energy transferred from a hotter object to a cooler one is referred to as heat. HEAT IS TRANSFERRED IN 3 WAYS: radiation, conduction, and convection

  4. RADIATION The direct transfer of energy by electromagnetic waves is called radiation. -when you feel warmth of the sun’s rays on your face, you are feeling energy coming directly from the sun as radiation.

  5. Radiation cont. The heat you feel from the sun or a campfire travels directly to you as infrared radiation. You cannot see infrared radiation, but you can feel it as heat.

  6. CONDUCTION The direct transfer of heat from one substance to another substance that it is touching is called conduction. -when walking on a hot sandy beach, your feet feel hot because heat moved directly from the sand to your feet.

  7. Conduction cont. When a fast-moving molecule (sand) bumps into a nearby slower-moving molecule (your feet), it transfers some of its energy. The closer together the molecules in a substance are, the more effectively they can conduct heat. Air and water do not conduct heat very well.

  8. Story time… It starts snowing outside!! YUPPIE! We’re going outside to play! After snowball fights and building a snowman, we decide to go inside for some of mom’s yummy hot chocolate. After taking off all of our snow clothes and leaving it in a pile at the front door, mom puts our boots over the heat vent. A couple of hours later, we want to go out and play again, our boots are dry!! If the furnace is in the other room, how is this possible!?!?!

  9. CONVECTION The transfer of heat by the movement of a fluid is called convection. In fluids (liquids and gases), molecules can move from place to place. As molecules move, they take their heat along with them.

  10. 

  11. Heat Transfer in the Troposphere Although radiation, conduction, and convection work together to heat the troposphere, convection causes most of the heating.

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