Exploring Water's Curvature and Earth's Gravity

Water naturally finds a level surface. Yet, on a large scale, Earth's gravity curves water, clinging it to the planet's surface, creating a curved appearance observed from space.

Gravity is key to water's curvature. It pulls equally across Earth's surface, ensuring water remains as a 'skin' over the globe, despite the container shape, including oceans.

Sea-level is the average height of the ocean's surface. It's measured from multiple points, accounting for water's curvature, which is consistent over Earth's spherical shape.

Geodesy, the Earth measurement science, confirms water's curvature through precise calculations and observations, utilizing satellites and sea-level measurements.

Long bridges account for Earth's curve. Engineers must consider the planet's roundness; otherwise, bridge sections would not align properly, showcasing water's curvature indirectly.

The horizon appears flat due to human eyesight limitations. However, with sufficient elevation, like in a plane, the curvature becomes apparent, following Earth's shape.

Surface tension allows water to form droplets, a small-scale curve. This cohesive force, however, is negligible compared to gravity when considering Earth's water curvature.

Atop Mount Everest, water still curves around Earth, maintaining the sea-level curvature even at extreme altitudes, surprising many with its consistency.