Energy from the sun reaches Earth by
A
conduction and radiation.
B
radiation only.
C
conduction and convection.
D
conduction only.
B
radiation only.
The correct answer is B. Energy from the sun reaches Earth by radiation only.
The correct answer is B: radiation only.
Explanation:
Energy from the sun reaches Earth through radiation, which is the process of energy being transferred in the form of electromagnetic waves. Unlike conduction, which requires a physical contact between objects, and convection, which involves the movement of a fluid or gas, radiation can travel through the vacuum of space. The sun emits energy in the form of electromagnetic radiation, including visible light, ultraviolet rays, and infrared radiation. This radiation travels through space until it reaches Earth, where it is absorbed, reflected, or scattered by the atmosphere and the Earth's surface. So, the primary mode of energy transfer from the sun to Earth is radiation.