What is the process in which heat comes from the Sun to the Earth?

What is the process in which heat comes from the Sun to the Earth?

• A. Convection
• B. Conduction
• C. Homeostasis
• D. Radiation

Answer: (D)

Heat arriving from the Sun to Earth happens by radiation. Radiation is energy transfer through electromagnetic waves, which can travel through empty space, so no medium is needed. The Sun emits visible light and other wavelengths that travel across the vacuum of space and warm Earth's atmosphere and surface upon absorption. Conduction would require direct touch between objects, which isn’t possible across the vast space between Sun and Earth. Convection relies on moving fluids, which aren’t carrying heat across space. Homeostasis is a biological regulation process and isn’t involved here. So, the Sun’s heat reaches Earth mainly through radiation.

Heat arriving from the Sun to Earth happens by radiation. Radiation is energy transfer through electromagnetic waves, which can travel through empty space, so no medium is needed. The Sun emits visible light and other wavelengths that travel across the vacuum of space and warm Earth's atmosphere and surface upon absorption. Conduction would require direct touch between objects, which isn’t possible across the vast space between Sun and Earth. Convection relies on moving fluids, which aren’t carrying heat across space. Homeostasis is a biological regulation process and isn’t involved here. So, the Sun’s heat reaches Earth mainly through radiation.