The best description of the heat that arrives at Earth from the sun is that it arrives in the form of radiation.
- The energy from the Sun mostly reaches the Earth in form as solar radiation and as part of a large collection of energy called the electromagnetic radiation spectrum.
- Solar radiation do exist in states like visible light, ultraviolet light, infrared, radio waves etc. The heat that reaches the earth it, makes the molecules of the atmosphere warm,
Conclusively, The sun heats the earth via radiation because there is no medium like the gas in space and as such radiation is the primary way that heat travels in space.
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