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Space Shuttle
Grade 6
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Temperature and Heat

The transfer of energy by electromagnetic waves is called . These waves can travel through space from the to Earth. On Earth, radiation includes visible, , and waves. Our eyes cannot see infrared radiation. Objects give off visible light when they are to 600°C. As the temperature rises to thousands of degrees, the light becomes . When objects absorb electromagnetic energy, they might change from one state of to another, such as snow melting in sunshine. Heat can travel through solids by . It can travel through liquids and gases by another heat transfer called . For example, in the , warm air rises upward.