Question

1. energy from the sun reaches earth mainly by the process of

conduction
convection
reflection
radiation

Explanation:

To determine how solar energy reaches Earth, we analyze the options:

• Conduction requires direct contact (not possible in space).
• Convection needs a fluid medium (space is a vacuum).
• Reflection is bouncing (not energy transfer to Earth).
• Radiation is energy transfer via electromagnetic waves (works in a vacuum, matching space between Sun and Earth).

Answer:

radiation (the option labeled "radiation")