Question

what characterizes the earth as an open system, especially in terms of energy? the earth receives energy from the sun as sunlight and releases energy as heat. the earth absorbs energy from the sun as heat and does not release it. the earth emits energy as sunlight into space and does not absorb any.

Explanation:

An open system exchanges energy (and matter) with its surroundings. Earth receives solar energy (sunlight) and releases energy as heat (infrared radiation) back to space. The second option is wrong as Earth does release energy, and the third is wrong as Earth absorbs solar energy (not emits sunlight) and does absorb energy. So the first option is correct.

Answer:

The Earth receives energy from the Sun as sunlight and releases energy as heat.