What environmental process is primarily driven by solar energy?

What environmental process is primarily driven by solar energy?

• A. Soil erosion
• B. Water cycle
• C. Photosynthesis
• D. Earthquake activity

Answer: (C)

Solar energy powers many environmental processes, but the one that directly uses light to create usable energy is photosynthesis. In photosynthesis, chlorophyll captures sunlight and drives chemical reactions that turn carbon dioxide and water into glucose, releasing oxygen as a byproduct. This stored chemical energy becomes the fuel for nearly all living things and forms the base of most ecosystems, making photosynthesis the primary way solar energy enters the living world. The water cycle is also influenced by the sun, since solar heating drives evaporation, but that’s a physical process rather than a storage of solar energy in chemical form. Soil erosion and earthquakes depend on wind, water movement, gravity, and tectonic forces, not on solar energy.

Solar energy powers many environmental processes, but the one that directly uses light to create usable energy is photosynthesis. In photosynthesis, chlorophyll captures sunlight and drives chemical reactions that turn carbon dioxide and water into glucose, releasing oxygen as a byproduct. This stored chemical energy becomes the fuel for nearly all living things and forms the base of most ecosystems, making photosynthesis the primary way solar energy enters the living world. The water cycle is also influenced by the sun, since solar heating drives evaporation, but that’s a physical process rather than a storage of solar energy in chemical form. Soil erosion and earthquakes depend on wind, water movement, gravity, and tectonic forces, not on solar energy.