 | Term | Definition |
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Conduction |
happens when particles transfer their vibrations to neighboring particles. |
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Conduction |
occurs mainly in solids, when rapidly vibrating particles cause nearby particles to vibrate more rapidly. |
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Particles |
in a solid do not move from place to place, but vibrate back and forth. |
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Thermal energy |
is spread, or transferred, through three different processes. |
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What are the three ways thermal energy is spread? |
conduction, convection, andradiation. |
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Convection |
causes the currents of water or air created by the process of convection are called convection currents. |
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These particles move much more freely... |
gases, and liquids. |
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Rise... |
a warmer, lighter liquid will rise, while the surrounding cooler, denser liquid will sink. |
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Convection |
the process for transfer of thermal energy in liquids and gases. |
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Hot air balloon... |
the heater at the bottom creates convection currents that fill the balloon with hot air, causing it to rise. |
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Thermal radiation... |
all objects emit thermal radiation. |
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Vibrates faster... |
when an object thermal radiation. |
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Infrared radiation... |
you feel infrared radiation as heat because the specific wavelengths of this radiation affect the motions of the particles of your body. |
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Ultraviolet rays... |
are electromagnetic waves with shorter wavelengths than visible light. |
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What is a better conductor of heat? Wood or metal? |
Metal is a better conductor because it transfers thermal energy better than wood. |
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How does an insulator help keep something warm? |
they keep thermal energy from escaping into the air. |
