Final answer:
The absorbed insolation is used to heat Earth's surface and atmosphere, drive the water cycle through evaporation, and support life through photosynthesis.
Step-by-step explanation:
The 50% of insolation that is absorbed by Earth is crucial for maintaining life and processes on our planet. The three main uses of this absorbed solar energy are:
- Heating the Earth's surface and atmosphere, which creates and maintains the planet's temperature.
- Driving the hydrological cycle through evaporation of water, which is fundamental for weather systems and sustaining life.
- Supporting life through photosynthesis, which is the basis for the survival of plants and, indirectly, all animals and humans relying on plants for oxygen and food.
These processes are essential for the climate, ecosystems, and the overall energy balance of Earth.