Multiple choice

Earth is an open system of

  1. minerals

  2. energy

  3. gases

  4. water

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Earth is an open system for energy - it continuously receives solar radiation and radiates heat back into space. However, for matter, Earth is essentially a closed system with minimal mass exchange. The question asks specifically about the open system aspect, which is energy flow.