The major geological and hydrological cycles of Earth are driven by energy from the Sun.

Here's why:

* Solar Radiation: The Sun provides the primary energy source for Earth's climate system. This energy drives:

* Evaporation: The Sun's heat evaporates water from oceans, lakes, and rivers, initiating the water cycle.

* Weather Patterns: Uneven solar heating of the Earth's surface creates temperature differences, leading to winds and weather patterns.

* Plate Tectonics: While not directly caused by the Sun, the heat from Earth's core, which is ultimately a product of radioactive decay, drives plate tectonics. This process shapes mountains, creates volcanoes, and influences the distribution of landmasses.

Let me know if you'd like more details on any of these processes!