Question

earth is constantly receiving energy input from the sun. therefore earth is what type of system in regards to energy? open closed

Explanation:

An open system exchanges energy (and often matter) with its surroundings. Since Earth receives energy from the Sun (energy input from the surroundings), it fits the definition of an open system. A closed system does not exchange energy or matter with its surroundings, which is not the case here as there is energy input from the Sun.

Answer:

Open