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12 Cards in this Set
- Front
- Back
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thermal energy
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the energy of the movement of molecules in a substance
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temperature
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the measurement of how fast the molecules are moving in matter.
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conduction
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the movement of heat between 2 objects through direct touching
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conductor
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objects that allow thermal energy (heat) or electricity to move through them easily
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insulator
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that don’t allow heat or electricity to move through it well
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physical change
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a change in one or more physical properties. It can change back
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chemical change
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When a new material is made by combining two or more materials, it has chemical properties that are different from the original materials. It can’t change back
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light
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a form of energy that travels in straight lines in all directions.
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reflection
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light bouncing off an object to our eyes
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absorption
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light can be absorbed by objects
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refraction
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light is bent when it passes from one substance to another
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transparent
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light rays can pass right through
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