Question : Heat from the sun reaches the Earth by:
Option 1: reflection
Option 2: conduction
Option 3: radiation
Option 4: convection
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Correct Answer: radiation
Solution : The correct answer is radiation.
Heat energy from the sun reaches Earth in the form of electromagnetic radiation. It travels across the vacuum to Earth since it doesn't need a material medium to do so. The only energy source on Earth is the heat from the sun. Photons, which are tiny energy packets, are how this energy gets to Earth.
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