down 2.
A type of material that tries to prevent the flow of thermal energy.
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down 4.
The transfer of thermal energy by direct contact between objects.
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down 6.
Sound waves travel through ____, but cannot travel through empty space.
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down 8.
Light and sound energy travels in the form of ____.
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down 9.
Heated air that is lighter than the surrounding air will ____.
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down 10.
____ waves can travel through empty space.
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across 1.
The movement of thermal energy through liquids and gases.
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across 3.
The complete path where an electrical current flows.
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across 5.
Conduction, convection, and radiation are three forms of ____ transfer.
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across 7.
Light waves travel ____ than sound waves.
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across 9.
Thermal energy that travels in waves and can pass through empty space as well as some objects.
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across 11.
Sound energy is formed from particles that are ____.
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across 12.
Sound waves travel ____ than light waves.
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